tag:blogger.com,1999:blog-600308033623899292024-03-13T07:05:24.100-04:00ITAMPblogPosts related to ITAMP, activities at ITAMP, and all things on ITAMPITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.comBlogger25125tag:blogger.com,1999:blog-60030803362389929.post-79701769078504235802015-10-19T17:29:00.000-04:002015-10-19T17:29:51.098-04:00Time dilation affecting quantum superpositions<div class="MsoNormal">
Can gravity affect quantum systems? Quantum theory and
gravity seem to apply to very different physical regimes. It is often argued
that gravity is irrelevant on very small scales, where typical quantum phenomena
are observed. But as has been shown in numerous experiments, gravity can indeed
influence a quantum wave function of the smallest particles. Newtonian gravity
from Earth can induce a quantum phase-shift for a particle that is in a
superposition between two different heights. This was first demonstrated with
Neutrons in the famous COW (Colella-Overhauser-Werner) experiment in 1975 [1].</div>
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<o:p></o:p></div>
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<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="float: left; margin-right: 1em; text-align: left;"><tbody>
<tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/-rMKNR9ZxQrs/ViVY4Sk0F4I/AAAAAAAAAAU/cb2fm7X7Rnk/s1600/Fig-ST.jpg" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="196" src="http://1.bp.blogspot.com/-rMKNR9ZxQrs/ViVY4Sk0F4I/AAAAAAAAAAU/cb2fm7X7Rnk/s320/Fig-ST.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><div style="text-align: justify;">
<i><span style="font-size: 12.8px;">The gravitational field causes time dilation: </span><span style="font-size: 12.8px;">clocks closer to </span></i></div>
<div style="text-align: justify;">
<i><span style="font-size: 12.8px;">Earth </span></i><i style="font-size: 12.8px;"><span style="font-size: 12.8px;">run slower than clocks further away. </span><span style="font-size: 12.8px;">For a quantum </span></i></div>
<div style="text-align: justify;">
<i style="font-size: 12.8px;"><span style="font-size: 12.8px;">superposition </span></i><i style="font-size: 12.8px;"><span style="font-size: 12.8px;">of a single clock at two heights, </span><span style="font-size: 12.8px;">the clock </span></i></div>
<div style="text-align: justify;">
<i style="font-size: 12.8px;"><span style="font-size: 12.8px;">states and its position </span></i><i style="font-size: 12.8px;">become entangled.</i></div>
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</tbody></table>
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What about Einstein’s gravity? If the Newtonian potential
can influence a quantum wave function, what can one expect from post-Newtonian
effects stemming from general relativity? It turns out that novel phenomena
arise, with no classical analogue. Classically, <i>two</i> clocks placed at different heights will experience different
proper times, and thus will be time dilated with respect to each other. But in
quantum theory, an additional effect arises: If a <i>single</i> clock is brought into
superposition of two heights, its internal degrees of freedom (or clock states)
get entangled with its position [2]. The acquired “which-way information”
affects the quantum coherence of the position. <o:p></o:p></div>
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In a recent publication [3], we showed that the effect of
time dilation on quantum systems is very general and affects the quantum
coherence of any composite quantum system. Time dilation is universal: it
affects any system regardless of its structure or composition. Clocks are
affected by time dilation as much as the heart beat or the half-life of a
decaying particle. In fact, all composite quantum systems are affected, as they
usually have a finite temperature or energy spread: there is usually some internal
dynamics present within the system. If such a composite system is brought into
superposition between different heights above Earth, as in the above example
with a clock, time dilation will correlate all internal dynamics with the
height of the system. And this causes decoherence of the center-of-mass if a sufficient difference in proper times is accumulated along the superposed paths. Quantum coherence is lost because of the relative time delay of the internal dynamics of the system, which becomes position-dependent due to gravitational time dilation. There is no “external”
environment, only the presence of time dilation causes the system’s
center-of-mass to decohere due to the dynamics of its own composition. The effect follows from two very basic concepts of quantum theory and relativity: time dilation and quantum superpositions. </div>
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<o:p></o:p></div>
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="float: right; margin-left: 1em; text-align: right;"><tbody>
<tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-dS3-gSzZj_c/ViVZmKgowMI/AAAAAAAAAAg/BYmswwD_hu4/s1600/Fig_Molecule_plain.jpg" imageanchor="1" style="clear: right; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><span style="font-size: x-small;"><img border="0" height="176" src="http://2.bp.blogspot.com/-dS3-gSzZj_c/ViVZmKgowMI/AAAAAAAAAAg/BYmswwD_hu4/s320/Fig_Molecule_plain.jpg" width="320" /></span></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><div style="text-align: justify;">
<i><span style="font-size: small;">A complex molecule in superposition in a gravitational </span></i></div>
<div style="text-align: justify;">
<span style="font-size: small;"><i>field. </i><i>Because of time dilation, the frequencies of the </i></span></div>
<div style="text-align: justify;">
<span style="font-size: small;"><i>individual atoms </i><i>depend on the height of the molecule. </i></span></div>
<div style="text-align: justify;">
<span style="font-size: small;"><i>This causes decoherence </i><i>of quantum superpositions </i></span></div>
<div style="text-align: justify;">
<i><span style="font-size: small;">of the center-of-mass of the molecule.</span></i></div>
</td></tr>
</tbody></table>
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<div class="MsoNormal">
Even though time dilation is very weak on Earth, the effect can
already be relevant on mesoscopic scales: If a micro-scale object at room
temperature is put into a micrometer superposition, then time dilation will
cause decoherence on the order of milliseconds. This is because many internal
degrees of freedom contribute to the effect. Each individually is affected by
time dilation only a tiny bit, but for a larger composite system, the effect
can become significant. For quantum systems, it is of course very challenging
to prepare such large superpositions, and other decoherence effects will also
be of importance. But there is a parameter range at superfluid Helium temperatures,
where experiments with very large molecules or microspheres could in principle
observe the predicted phenomena in the future. Importantly, the effect is
universal and <i>any </i>internal dynamics
will contribute to decoherence. Thus one can think of other possible experiments,
utilizing any internal dynamics. Many basic concepts that enter the effect are also discussed in our pedagogical note [4].</div>
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<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<br />
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Finally, what do we actually learn from this study? In our
work, we do not treat the gravitational field quantum mechanically, thus there
is no direct connection to “quantum gravity”. Yet, we study how quantum
mechanical test systems behave on a background space-time, as opposed to
classical test particles, and new effects arise. We found a new decoherence
mechanism, but the most important aspect of the work is that the interplay
between quantum theory and gravity has novel phenomena to offer. Our work shows
one example, but this research direction is still widely unexplored: Many more
possible effects and experiments on the interplay between these two great
theories are waiting to be discovered!<o:p></o:p></div>
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<br /></div>
<div class="MsoNormal">
<span lang="DE">[1] R. Colella, A.
W. Overhauser, S. A. Werner. </span>“Observation of Gravitationally Induced
Quantum Interference”, <a href="http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.34.1472"><i>Phys. </i><i><span lang="SV">Rev.
Lett.</span></i></a><span lang="SV"><a href="http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.34.1472"> <b>34</b>, 1472 (1975)</a>.<o:p></o:p></span></div>
<div class="MsoNormal">
<span lang="SV">[2] M. Zych, F.
Costa, I. Pikovski, Č. Brukner. </span>“Quantum interferometric visibility as a
witness of general relativistic proper time”, <a href="http://www.nature.com/ncomms/journal/v2/n10/abs/ncomms1498.html">Nature Communications 2,505 (2011)</a>.<o:p></o:p></div>
<div class="MsoNormal">
[3] I. Pikovski, M. Zych, F. Costa, Č. Brukner, “Universal
decoherence due to gravitational time dilation”, <a href="http://www.nature.com/nphys/journal/v11/n8/full/nphys3366.html">Nature Physics 11,668-672 (2015)</a>.<o:p></o:p></div>
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</div>
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[4] I. Pikovski, M. Zych, F. Costa, Č. Brukner, “Time
Dilation in Quantum Systems and Decoherence: Questions and Answers”, <a href="http://arxiv.org/abs/1508.03296"><i>arXiv:1508.03296</i> [quant-ph] (2015)</a>.<o:p></o:p></div>
Anonymousnoreply@blogger.com1tag:blogger.com,1999:blog-60030803362389929.post-60625746429633114262013-07-31T08:20:00.000-04:002013-07-31T08:20:04.219-04:00Binding together repelling atoms<div style="text-align: left;">
</div>
<div style="text-align: justify;">
Basic chemistry tells us that a bond between atoms can form if it is energetically more favorable for the atoms to stick together than staying apart. This fundamentally requires an attractive force between the atoms. However, new theoretical predictions show that the combination of a repelling force and controlled noise from an environment can also have the surprising effect of leading to a bound state, although one with quite exotic properties. The research team consisting of ITAMP postdoc Mikhail Lemeshko and former ITAMP postdoc Hendrik Weimer* <a href="http://dx.doi.org/10.1038/ncomms3230" target="_blank">report their results in the journal Nature Communications</a> [1].</div>
<div>
<br /></div>
<div>
<a href="http://1.bp.blogspot.com/-VgEe8l4ESGg/Ufj-yxsZMXI/AAAAAAAAu80/Q7P1b5x_Yow/s1600/thumbnail.jpg" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" src="http://1.bp.blogspot.com/-VgEe8l4ESGg/Ufj-yxsZMXI/AAAAAAAAu80/Q7P1b5x_Yow/s200/thumbnail.jpg" /></a><div style="text-align: justify;">
How is it possible that repulsion and noise, both two effects countering the formation of a chemical bond, can lead to a bound state nevertheless? To understand this, one has to take into account the quantum properties of the atoms: adding controlled noise to a quantum system can result in an interference phenomenon that traps the atoms in a well-defined quantum state. The repulsive force then ensures that this trapping occurs at a particular distance, which sets the length of the bond. The nature of the novel bound state is strikingly different from their chemical counterparts. For example, the bound state is remarkably robust and can hardly be broken by depositing a constant amount of energy to it.</div>
<br /><div style="text-align: justify;">
Lemeshko and Weimer consider one of the most basic and universally available sources of noise: vacuum fluctuations of the electromagnetic field. In the past, the techniques making use of these quantum fluctuations have led to dramatic improvements in laser cooling, culminating in the results that were awarded the 1997 Nobel Prize in Physics. The authors believe that the first applications of the discovered binding mechanism might be in the area of cooling of atomic quantum gases.</div>
</div>
<div>
<div>
<div>
<br />*presently at the Institute for Theoretical Physics at Leibniz Universität Hannover, Germany <br /><br /></div>
<div>
[1] M. Lemeshko, H. Weimer. <a href="http://dx.doi.org/10.1038/ncomms3230" target="_blank">Dissipative binding of atoms by non-conservative forces.</a> Nature Communications 4, 2230 (2013).</div>
</div>
</div>
<div>
<span style="text-align: justify;"><br /></span></div>
<div>
<span style="text-align: justify;">[The attached figure shows the probability distribution of two atoms forming the novel bond. Red color indicating high probability occurs </span><span style="text-align: justify;">at lines of fixed distance between the atoms.]</span></div>
Unknownnoreply@blogger.com17tag:blogger.com,1999:blog-60030803362389929.post-17008509658218141822013-05-17T09:59:00.003-04:002013-05-31T11:30:56.488-04:00<h3 class="post-title entry-title" itemprop="name">
ITAMP 2013 DAMOP presentations (Quebec City Canada)</h3>
<b>James Babb</b><br />
4:00 PM–4:00 PM, Tuesday, June 4, 2013<br />
Room: 400A<br />
Abstract: D1.00131 : Rydberg helium and the helium dimer: Relativistic and retardation effects<br />
http://meeting.aps.org/Meeting/DAMOP13/Event/194145<br />
<br />
<span class="largernormal"> <b>Johannes Feist</b></span><br />
<div style="margin-top: 0px;">
4:00 PM–4:00 PM, Tuesday, June 4, 2013<br />
Room: 400A</div>
<div style="margin-top: 0px;">
Abstract: D1.00057 <a href="http://meeting.aps.org/Meeting/DAMOP13/Event/194071">Deterministic Coupling of a Single Atom to a Nanoscale Optical Cavity</a></div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194071<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal"><b>Doerte Blume</b></span><br />
4:00 PM–4:00 PM, Tuesday, June 4, 2013<br />
Room: 400A<br />
Abstract: D1.00061 : Thermodynamics of systems of aligned dipoles<br />
http://meeting.aps.org/Meeting/DAMOP13/Event/194075<br />
<br />
<a href="http://meeting.aps.org/Meeting/DAMOP13/SessionIndex2/?SessionEventID=197992">
</a><br />
<a href="http://meeting.aps.org/Meeting/DAMOP13/SessionIndex2/?SessionEventID=197992">
</a>
<br />
<div style="margin-top: 0px;">
<span class="largernormal"><b>Doerte Blume</b></span><br />
<span class="largernormal"><b><span class="largernormal">
X.Y. Yin</span> </b></span></div>
<div style="margin-top: 0px;">
4:00 PM–4:00 PM, Wednesday, June 5, 2013<br />
Room: 400A</div>
<div style="margin-top: 0px;">
Abstract: K1.00046 : Energy spectra of small two-component Fermi gases in a cubic box with periodic boundary conditions</div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194392<br />
<div style="margin-top: 0px;">
<br />
<span class="largernormal"><b>Doerte Blume</b></span><br />
<span class="largernormal"><b><span class="largernormal">Seyed Ebrahim Gharashi</span></b></span><br />
<span class="largernormal"><span class="largernormal">3:00 PM–3:12 PM, </span></span>Thursday, June 6, 2013<br />
<span class="largernormal"><span class="largernormal">Room: 200A </span></span><br />
<span class="largernormal"><span class="largernormal">Abstract: </span></span>P1.00003 : Correlations of the metastable branch of harmonically-trapped one-dimensional two-component Fermi gases<br />
http://meeting.aps.org/Meeting/DAMOP13/Event/194605<br />
<br />
<span class="largernormal"><b>Doerte Blume</b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal">Yangqian Yan</span> </b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal">4:00 PM–4:00 PM<b>,</b> Thursday, June 6, 2013</span></div>
<div style="margin-top: 0px;">
<span class="largernormal">Room: 400A</span></div>
<div style="margin-top: 0px;">
<span class="largernormal">Abstract:</span>Q1.00048 : Finite-temperature properties of small trapped two-component Fermi gases: Tan contact and statistics</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194718<br />
<br />
<span class="largernormal"><b>Doerte Blume</b></span> <br />
<span class="largernormal">
<b>Janine Shertzer</b></span><br />
<div style="margin-top: 0px;">
10:30 AM–12:30 PM, Friday, June 7, 2013<br />
Room: 303<br />
Abstract: U7.00006 : Scattering properties of three ultracold atoms in a cylindrical waveguide geometry
</div>
<div style="margin-top: 0px;">
11:30 AM–11:42 AM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194915<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal"><b>Doerte Blume</b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"> Arghavan Safavi</span> </b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal">
Seth Rittenhouse</span> </b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal">Hossein Sadeghpour</span></b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"></span></b></span>10:30 AM–12:30 PM, Friday, June 7, 2013<br />
Room: 303<br />
Abstract: U7.00007 : Non-universal bound states of two identical heavy fermions and one light particle</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194916<br />
<br />
<b><span class="largernormal">Tony Lee</span></b><br />
<b><span class="largernormal"><span class="largernormal">
Sarang Gopalakrishnan</span></span></b><br />
<b><span class="largernormal"><span class="largernormal"><span class="largernormal">Mikhail Lukin</span> </span> </span></b><br />
<div style="margin-top: 0px;">
8:00 AM–9:48 AM, Wednesday, June 5, 2013<br />
Room: 204<br />
Abstract: Dissipative phase transitions in anisotropic spin models
</div>
<div style="margin-top: 0px;">
9:12 AM–9:24 AM</div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194201<br />
<br />
<div style="margin-top: 0px;">
<b><span class="largernormal">Tony Lee</span></b> </div>
<div style="margin-top: 0px;">
<b><span class="largernormal">Anzi Hu</span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal">
Charles Clark</span></b> </span></div>
<div style="margin-top: 0px;">
<span class="largernormal"></span>10:30 AM–12:30 PM, Wednesday, June 5, 2013<br />
Room: 202<br />
Abstract: H3.00007 : Long-range spatial correlations in a driven-dissipative system of Rydberg atoms
</div>
<div style="margin-top: 0px;">
11:42 AM–11:54 AM</div>
<span class="largernormal"></span>http://meeting.aps.org/Meeting/DAMOP13/Event/194255<br />
<br />
<span class="largernormal"> <b>Mikhail Lemeshko</b></span><br />
<span class="largernormal"><b><span class="largernormal">Hendrik Weimer</span> </b></span> <br />
<div style="margin-top: 0px;">
2:00 PM–4:00 PM, Wednesday, June 5, 2013<br />
Room: 202<br />
Abstract: J3.00006 : Dissipative binding of atoms by non-conservative forces
</div>
<div style="margin-top: 0px;">
3:00 PM–3:12 PM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194314<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal"><b>Mikhail Lemeshko</b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal">
Satyan Bhongale</span></b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal">
Ludwig Mathey</span> </span></b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal">
Erhai Zhao</span> </span></b></span></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal">
Susanne Yelin</span> </span> </b></span></div>
<div style="margin-top: 0px;">
10:30 AM–12:30 PM, Thursday, June 6, 2013<br />
Room: 200B<br />
Abstract: N2.00008 : Quantum phases of quadrupolar Fermi gases in optical lattices
</div>
<div style="margin-top: 0px;">
11:54 AM–12:06 PM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194553<br />
<br />
<b><span class="largernormal">Charles Mathy</span></b><br />
<b><span class="largernormal">Michael Knap</span></b><br />
<span class="largernormal"><b><span class="largernormal">Eugene Demler</span></b> </span><br />
<div style="margin-top: 0px;">
10:30 AM–12:06 PM, Thursday, June 6, 2013<br />
Room: 202<br />
Abstract: Quantum flutter versus Bloch oscillations in one-dimensional quantum liquids out of equilibrium
</div>
<div style="margin-top: 0px;">
10:42 AM–10:54 AM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194558<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal">
<b>Swati Singh</b></span></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal"> Steven Steinke</span></span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal"><span class="largernormal">Pierre Meystre</span></span></span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal"><span class="largernormal"><span class="largernormal">Keith Schwab</span> </span></span></span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal"><span class="largernormal">Mukund Vengalattore</span> </span></span></b> </span></div>
<div style="margin-top: 0px;">
<span class="largernormal"></span>10:30 AM–12:06 PM, Tuesday, June 4, 2013<br />
Room: 202<br />
Abstract: B3.00007 : Measurement backaction on a spinor condensate from off-resonant light
</div>
<div style="margin-top: 0px;">
11:42 AM–11:54 AM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/193908<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal"> <b>Swati Singh</b></span></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal">
Adi Pick</span></span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal"><span class="largernormal">Mikhail D. Lukin</span></span></span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal"><span class="largernormal">Susanne F. Yelin</span> </span></span></b> </span></div>
<div style="margin-top: 0px;">
<span class="largernormal"> </span>8:00 AM–9:24 AM, Friday, June 7, 2013<br />
Room: 302<br />
Abstract:T6.00003 : Cooling of Nuclear Spins in Diamond via Dark State Spectroscopy
</div>
<div style="margin-top: 0px;">
8:24 AM–8:36 AM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194846<br />
<br />
<div style="margin-top: 0px;">
<span class="largernormal">
<b>Arghavan Safavi-Naini</b></span></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal">Barbara Capogrosso-Sansone</span></span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><b><span class="largernormal"><span class="largernormal"> Anatoly Kuklov</span> </span></b> </span></div>
<div style="margin-top: 0px;">
<span class="largernormal"></span>2:00 PM–4:00 PM, Wednesday, June 5, 2013<br />
Room: 200B<br />
Abstract: J2.00001 : Strongly interacting quantum phases of polarized dipolar bosons in multi-layered optical lattice
</div>
<div style="margin-top: 0px;">
2:00 PM–2:12 PM</div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194298<br />
<br />
<div style="margin-top: 0px;">
<b><span class="largernormal">Arghavan Safavi</span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal">Seth Rittenhouse</span></span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal"><span class="largernormal">
Dorte Blume</span> </span></span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><span class="largernormal"><span class="largernormal">
Hossein Sadeghpour</span> </span> </span></div>
<div style="margin-top: 0px;">
<span class="largernormal"></span>10:30 AM–12:30 PM, Friday, June 7, 2013<br />
Room: 303<br />
Abstract: U7.00007 : Non-universal bound states of two identical heavy fermions and one light particle
</div>
<div style="margin-top: 0px;">
11:42 AM–11:54 AM</div>
<div style="margin-top: 0px;">
http://meeting.aps.org/Meeting/DAMOP13/Event/194916<br />
<br />
<div style="margin-top: 0px;">
<b><span class="largernormal">Janine Shertzer</span></b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"><span class="largernormal">Aaron Temkin</span></span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"><span class="largernormal"> </span> </span>4:00 PM–4:00 PM, Wednesday, June 5, 2013<br />
Room: 400A<br />
Abstract: K1.00131 : Electron scattering from excited states of H: derivation of the ionization threshold law
</div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194477<br />
<br />
<div style="margin-top: 0px;">
<b><span class="largernormal">Janine Shertzer</span> </b></div>
<div style="margin-top: 0px;">
<b><span class="largernormal"> Doerte Blume</span></b></div>
<div style="margin-top: 0px;">
<span class="largernormal"> </span>10:30 AM–12:30 PM, Friday, June 7, 2013<br />
Room: 303<br />
Abstract: U7.00006 : Scattering properties of three ultracold atoms in a cylindrical waveguide geometry
</div>
<div style="margin-top: 0px;">
11:30 AM–11:42 AM</div>
http://meeting.aps.org/Meeting/DAMOP13/Event/194915</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div id="mainContent">
</div>
ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-6688344309554054792013-04-19T12:36:00.001-04:002013-04-19T12:43:27.462-04:00Quadrupolar atoms and molecules as a new platform to study many-body physics<div style="text-align: justify;">
The ongoing quest on achieving high-density samples of dipolar atoms and molecules aims at observing the exciting many-body phenomena predicted in such systems [1].</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
In the <a href="http://link.aps.org/doi/10.1103/PhysRevLett.110.155301">recent article in Physical Review Letters</a> [2], the authors from ITAMP, George Mason University, and the University of Hamburg, introduced an alternative platform for quantum simulation of many-body systems. The proposed setup is based on nonspherical atoms or molecules with zero dipole moments but possessing a significant value of electric quadrupole moments.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
Considering a quadrupolar Fermi gas trapped in a 2D square optical lattice, the authors showed that the peculiar symmetry and broad tunability of the quadrupole-quadrupole interaction results in a rich phase diagram encompassing unconventional BCS and charge density wave phases, and opens up a perspective to create a topological superfluid.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
Quadrupolar species, such as metastable alkaline-earth atoms and homonuclear molecules, are stable against chemical reactions and collapse and are readily available in experiment at higher densities compared to the dipolar atoms and molecules.</div>
<div>
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<a href="http://3.bp.blogspot.com/-kzG3UtnYzMc/UXFyQ8FcjWI/AAAAAAAAuRU/VoIanes_Y5s/s1600/fig.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="322" src="http://3.bp.blogspot.com/-kzG3UtnYzMc/UXFyQ8FcjWI/AAAAAAAAuRU/VoIanes_Y5s/s400/fig.png" width="400" /></a></div>
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<div style="text-align: justify;">
[1] T. Lahaye et al., Rep. Prog. Phys. 72, 126401 (2009); M. Baranov, Phys. Rep. 464, 71 (2008)</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
[2] S. G. Bhongale, L. Mathey, E. Zhao, S. F. Yelin, M. Lemeshko, Phys. Rev. Lett. 110, 155301 (2013)<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.727272033691406px;">
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Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-60030803362389929.post-25306000454387040922013-02-08T06:15:00.002-05:002013-02-08T06:15:41.909-05:00Collective Qubits Compute Faster<p>Quantum computers can solve certain problems much faster than their
classical counterparts, but their realization on a scale relevant for
practical applications has proven to be very difficult. However, this
could change with a new method for solid state quantum computers
devised at ITAMP. We <a href="http://dx.doi.org/10.1103/PhysRevLett.110.067601">report our
results</a> in the journal Physical Review Letters.</p>
<p>While controlling single quantum bits ("qubits") is nowadays possible
with high precision, the realization of large networks with many
qubits remains an outstanding challenge. This is particularly relevant
for devices based on magnetic impurities in solid state systems, where
the magnetic interaction between the qubits is too weak. However, the
research team could now show that this obstacle could be solved by
grouping about 100 impurities to form a single collective qubit. When
an external magnetic field is chosen correctly, the magnetic
properties of the impurities lose their individual characteristics and
become indistinguishable due to their quantum nature. Such collective
quantum states are known to show drastically increased interaction
strengths, allowing to perform faster quantum logic operations between
the collective qubits.</p>
<div class="separator" style="clear: both; text-align: center;">
<a href="http://2.bp.blogspot.com/-EYg_DBpzM-g/URTdX4ZUBiI/AAAAAAAAAAc/eEzZYsxQvuI/s1600/Collective_Qubits.png" imageanchor="1" style="clear:right; float:right; margin-left:1em; margin-bottom:1em"><img border="0" height="150" width="200" src="http://2.bp.blogspot.com/-EYg_DBpzM-g/URTdX4ZUBiI/AAAAAAAAAAc/eEzZYsxQvuI/s200/Collective_Qubits.png" /></a></div>
<p>While the proposed method is applicable for a large class of solid
state qubits, the scientists present a detailed analysis for
nitrogen-vacancy defect centers in diamond, demonstrating the
realizability of much larger quantum networks. As few as <a href="http://www.quantenblog.net/physics/moores-law-quantum-computer">50
collective qubits are sufficient</a> for immediate applications in the
simulation of strongly correlated quantum systems.</p>
<p>
Reference: Hendrik Weimer, Norman Y. Yao, Mikhail D. Lukin. <a href="http://dx.doi.org/10.1103/PhysRevLett.110.067601">Collectively
enhanced interactions in solid-state spin qubits</a>, Physical Review
Letters <b>110</b>, 067601 (2013).
</p>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-76498216679313429922012-08-07T13:22:00.001-04:002012-08-07T13:22:47.874-04:00ICAP 2012This year the <a href="http://www-lpl.univ-paris13.fr/ICAP2012/" target="_blank">International Conference on Atomic Physics</a> was hosted by École Polytechnique in Palaiseau near Paris, France.<br />
<br />
<a href="https://sites.google.com/site/mishalemeshko/" target="_blank">Misha Lemeshko</a> presented a poster "Dynamically engineering strongly-interacting phases in ultracold dipolar gases" <a href="https://dl.dropbox.com/u/27325088/website%20files/Presentations/Lemeshko_Hannover_02.08.12.pdf" target="_blank">[pdf]</a>, describing his recent work in collaboration with <a href="https://www.cfa.harvard.edu/~hweimer/index.html" target="_blank">Hendrik Weimer</a> and <a href="http://www.chem.ubc.ca/our-people/profiles/roman-krems" target="_blank">Roman Krems</a>.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-1147666704879862882012-07-16T11:12:00.000-04:002012-07-16T11:17:47.611-04:00Building a crystal out of quantum bricksPreparation of strongly interacting many-body phases starting from a weakly interacting quantum gas is known to be very challenging. It involves crossing a phase transition, where the energy gap protecting the ground state becomes vanishingly small for large systems. In a <a href="http://prl.aps.org/abstract/PRL/v109/i3/e035301">recent publication in Physical Review Letters</a>, we report on a recipe to overcome this problem. In our work, we study the formation of dipolar spin crystals of ultracold polar molecules trapped in an optical lattice. We demonstrate that one can achieve a substantially better growth of the emergent spin crystal using non-adiabatic driving of rotational transitions.<br />
<br />
Our proposed technique builds on the dipole blockade of microwave excitations. In the context of an effective spin-1/2 model, the dipole blockade allows to flip particular spins in an optical lattice without a need for single-site addressing. The growth of the spin crystal is started by a short sequence of microwave pulses that create a few flipped spins, serving as a nucleation center of the crystalline phase. After that, continuous microwave driving propagates the boundary of the crystal, adding one additional flipped spin after the other.<b id="internal-source-marker_0.847955048782751">
<span style="background-color: transparent; font-family: Arial; font-size: 15px; font-weight: normal; vertical-align: baseline; white-space: pre-wrap;"></span><span style="background-color: transparent; font-family: Arial; font-size: 15px; font-weight: normal; vertical-align: baseline; white-space: pre-wrap;"></span><br /><br /><span style="font-weight: normal;">We investigate the dynamics under the continuous driving and demonstrate that the growth of the ordered domains is efficient. The analysis of the imperfections and the required experimental parameters shows that structures consisting of more than 1,000 spins can be grown. The average size of the resulting domains scales substantially more favorable compared to the conventional adiabatic preparation.</span></b><br />
<br />
<br />
<a href="http://1.bp.blogspot.com/-Nc779i5SmFY/UAQusbkk4cI/AAAAAAAAVDk/Em_A9xs_KAE/s1600/pulses.jpg" imageanchor="1" style="font-weight: normal; margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" height="247" src="http://1.bp.blogspot.com/-Nc779i5SmFY/UAQusbkk4cI/AAAAAAAAVDk/Em_A9xs_KAE/s320/pulses.jpg" width="320" /></a><br />
<br />
<br />
Reference: Mikhail Lemeshko, Roman V. Krems, and Hendrik Weimer,<br />
"Nonadiabatic Preparation of Spin Crystals with Ultracold Polar Molecules",<br />
<a href="http://prl.aps.org/abstract/PRL/v109/i3/e035301">Phys. Rev. Lett. 109, 035301 (2012)</a>.<br />
<br />
<br />
<i>About the authors: Misha Lemeshko and Hendrik Weimer are the ITAMP Postdoctoral Fellows at the Harvard-Smithsonian Center for Astrophysics and Harvard Physics Department; Roman Krems is an Associate Professor of Chemistry at the University of British Columbia in Vancouver.</i><b id="internal-source-marker_0.847955048782751"><span style="background-color: transparent; font-family: Arial; font-size: 15px; font-weight: normal; vertical-align: baseline; white-space: pre-wrap;">
</span></b>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-83601355037351251442012-05-23T13:57:00.003-04:002012-05-23T13:57:33.933-04:00<h3 class="post-title entry-title" itemprop="name">
ITAMP 2012 DAMOP presentations (Orange County, California)</h3>
<b>James Babb</b><br />
10:30 AM-12:30 PM, Thursday, June 7, 2012<br />
Room: Terrace<br />
Abstract: N7.00006 : Long-range interactions between Mg atoms<br />
11:30 AM–11:42 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171916 <br />
<br />
<span class="largernormal"> <b>Johannes Feist</b></span><br />
8:00 AM–10:00 AM, Wednesday, June 6, 2012<br />
Room: Garden 1-2<br />
Abstract: G4.00005 : Nanoplasmonic light field synthesis for isolated attosecond pulse generation<br />
<br />
9:24 AM–9:36 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171477<br />
<br />
<span class="largernormal"><b>Johannes Feist</b></span><br />
<span class="largernormal"></span>4:00 PM–4:00 PM, Wednesday, June 6, 2012<br />
Room: Royal Ballroom<br />
Abstract: K1.00021 : Attosecond streaking of correlated two-electron transitions<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171658 <br />
<br />
<b><span class="largernormal">Adam Kirrander</span></b><br />
4:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Royal Ballroom<br />
Abstract: D1.00037 : Quantum dynamics in strong fields with Fermion Coupled Coherent States<br />
<span class="largernormal"> http://meetings.aps.org/Meeting/DAMOP12/Event/171332</span><br />
<br />
<b><span class="largernormal">Adam Kirrander</span></b><br />
<b><span class="largernormal"></span></b>8:00 AM–10:00 AM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: M6.00007 : Theoretical Dynamics of Heavy Rydberg States in Rb$_2$<br />
9:12 AM–9:24 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171850 <br />
<br />
<b><span class="largernormal">Adam Kirrander</span></b><br />
<b><span class="largernormal"></span></b>4:00 PM–4:00 PM, Thursday, June 7, 2012<br />
Room: Royal Ballroom<br />
Abstract: Q1.00009 : X-ray diffraction assisted spectroscopy of Rydberg states<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171991 <br />
<br />
<br />
<br />
<span class="largernormal"> <b>Mikhail Lemeshko</b></span><br />
2:00 PM–4:00 PM, Wednesday, June 6, 2012<br />
Room: Garden 3<br />
Abstract: J5.00004 : Molecular interactions in and with fields: thermal collisions, ultracold gases, supersymmetry<br />
3:30 PM–4:00 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171614 <br />
<br />
<span class="largernormal"> <b>Guin-Dar Lin</b></span><br />
2:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Grand Ballroom GF<br />
Abstract: C2.00010 : Cooling of particle ensembles with cooperative effects<br />
3:48 PM–4:00 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171260 <br />
<span class="largernormal"></span><br />
<span class="largernormal"> </span><b><span class="largernormal"> </span></b><br />
<b><span class="largernormal">Jerome Loreau</span></b><br />
8:00 AM–10:00 AM, Friday, June 8, 2012<br />
Room: Garden 1-2<br />
Abstract: T4.00007 : Non-reactive collisions of sodium and silver atoms with nitrogen molecules<br />
<br />
9:12 AM–9:24 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/172175 <br />
<span class="largernormal"> </span> <br />
<b><span class="largernormal">Charles Mathy</span></b><br />
2:00 PM–4:00 PM, Thursday, June 7, 2012<br />
Room: Garden 1-2<br />
Abstract: P4.00005 : Quantum flutter of supersonic particles in one-dimensional quantum liquids<br />
<br />
2:48 PM–3:00 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171944 <br />
<br />
<span class="largernormal"> <b>Roberto Onofrio</b></span><b><span class="largernormal"> </span></b><br />
10:30 AM–12:30 PM, Wednesday, June 6, 2012<br />
Room: Grand Ballroom E<br />
Abstract: H3.00004 : Angular momentum changing transitions in proton-Rydberg hydrogen atom collisions<br />
<br />
11:06 AM–11:18 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171529 <br />
<br />
<b><span class="largernormal">Seth Rittenhouse</span></b><br />
4:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Royal Ballroom<br />
Abstract: D1.00122 : Theoretical and Experimental evidence for the observation of trilobite states in Cs<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171417 <br />
<br />
<b><span class="largernormal">Seth Rittenhouse</span></b><br />
<b><span class="largernormal"> </span></b>8:00 AM–10:00 AM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: M6.00005 : Homonuclear cesium Rydberg molecules<br />
8:48 AM–9:00 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171848 <br />
<br />
<b><span class="largernormal">Seth Rittenhouse</span></b><br />
<b><span class="largernormal"> </span></b>10:30 AM–12:30 PM, Thursday, June 7, 2012<br />
Room: Grand Ballroom GF<br />
Abstract: N2.00003 : First order SF-MI transition in the Bose-Hubbard model with tunable three-body onsite interaction<br />
10:54 AM–11:06 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171859 <br />
<br />
<span class="largernormal"> <b>H.R. Sadeghpour</b></span><br />
0:30 AM–12:30 PM, Wednesday, June 6, 2012<br />
Room: Grand Ballroom E<br />
Abstract: H3.00004 : Angular momentum changing transitions in proton-Rydberg hydrogen atom collisions<br />
11:06 AM–11:18 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171529 <br />
<br />
<span class="largernormal"><b>H.R. Sadeghpour</b></span><br />
<span class="largernormal"><b> </b></span>8:00 AM–10:00 AM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: M6.00007 : Theoretical Dynamics of Heavy Rydberg States in Rb$_2$<br />
9:12 AM–9:24 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171850 <br />
<span class="largernormal"> </span><br />
<br />
<span class="largernormal"><b>H.R. Sadeghpour</b></span><br />
<span class="largernormal"><b> </b></span>2:00 PM–3:48 PM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: P6.00009 : An ab-initio model of anomalous heating in planar ion traps<br />
3:36 PM–3:48 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171970<br />
<br />
<span class="largernormal"><b>H.R. Sadeghpour</b></span><br />
<span class="largernormal"><b> </b></span>8:00 AM–10:00 AM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: M6.00005 : Homonuclear cesium Rydberg molecules<br />
8:48 AM–9:00 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171848 <br />
<br />
<span class="largernormal"><b>H.R. Sadeghpour</b></span><br />
<span class="largernormal"><b> </b></span>2:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Terrace<br />
Abstract: C7.00004 : Rydberg atom mediated polar molecule interactions<br />
3:30 PM–4:00 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171294 <br />
<br />
<span class="largernormal"><b>H.R. Sadeghpour</b></span><br />
<span class="largernormal"><b> </b></span>4:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Royal Ballroom<br />
Abstract: D1.00122 : Theoretical and Experimental evidence for the observation of trilobite states in Cs<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171417 <br />
<br />
<br />
<span class="largernormal"> <b>Arghavan Safavi-Naini</b></span><br />
<span class="largernormal"> </span>10:30 AM–12:30 PM, Thursday, June 7, 2012<br />
Room: Grand Ballroom GF<br />
Abstract: N2.00003 : First order SF-MI transition in the Bose-Hubbard model with tunable three-body onsite interaction<br />
10:54 AM–11:06 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171859 <br />
<br />
<span class="largernormal"><b>Arghavan Safavi-Naini</b></span><br />
<span class="largernormal"><b> </b></span>2:00 PM–3:48 PM, Thursday, June 7, 2012<br />
Room: Garden 4<br />
Abstract: P6.00009 : An ab-initio model of anomalous heating in planar ion traps<br />
3:36 PM–3:48 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171970 <br />
<b><br /></b><br />
<b><span class="largernormal">Hendrik Weimer</span></b><br />
8:00 AM–10:00 AM, Friday, June 8, 2012<br />
Room: Grand Ballroom GF<br />
Abstract: T2.00006 : Supersymmetry in Rydberg-dressed lattice fermions<br />
9:00 AM–9:12 AM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/172156 <br />
<br /><b><span class="largernormal"> </span><span class="largernormal">Susanne Yelin</span></b><br />
2:00 PM–4:00 PM, Tuesday, June 5, 2012<br />
Room: Grand Ballroom GF<br />
Abstract: C2.00010 : Cooling of particle ensembles with cooperative effects<br />
3:48 PM–4:00 PM<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171260<br />
<br />
<b><span class="largernormal">Susanne Yelin</span></b><br />
<b><span class="largernormal"> </span></b>4:00 PM–4:00 PM, Wednesday, June 6, 2012<br />
Room: Royal Ballroom<br />
Abstract: K1.00066 : Theory of laser cooling of nuclear spins based on coherent population trapping<br />
http://meetings.aps.org/Meeting/DAMOP12/Event/171703<br /><br />
<br /><b><span class="largernormal"> </span></b><br />
<br />
<br />
<br />
<span class="largernormal"> </span><span class="largernormal"> </span>ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-74949929691777508922012-03-05T13:55:00.003-05:002012-03-05T14:18:41.548-05:00ITAMP Talks at the DPG Spring Meeting (Stuttgart, Germany)<span style="font-size:100%;"><b style="font-family: arial;">Demler, Eugene</b><br /><span style="font-family:arial;">SYRA 2.4 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra2.pdf">Supersymmetry in Rydberg-dressed lattice fermions</a><br /><br /><b style="font-family: arial;">Laumann, Chris</b><br /><span style="font-family:arial;">Q 19.1 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/q19.pdf">Long-range quantum gates for nitrogen-vacancy defect centers in diamond</a><br /><br /><b style="font-family: arial;">Lukin, Mikhail</b><br /><span style="font-family:arial;">Q 7.7 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/q7.pdf">Robustness of Topological Operations with Ultracold Atoms</a><br /><span style="font-family:arial;">Q 19.1 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/q19.pdf">Long-range quantum gates for nitrogen-vacancy defect centers in diamond</a><br /><span style="font-family:arial;">SYRA 1.4 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra1.pdf">Electromagnetically Induced Transparency in Strongly Interacting Rydberg Gases</a><br /><span style="font-family:arial;">SYRA 2.4 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra2.pdf">Supersymmetry in Rydberg-dressed lattice fermions</a><br /><br /><b style="font-family: arial;">Rittenhouse, Seth</b><br /><span style="font-family:arial;">SYRA 2.3 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra2.pdf">Electric field impact on ultra-long-range triatomic polar Rydberg molecules</a><br /><br /><b style="font-family: arial;">Sadeghpour, Hossein</b><br /><span style="font-family:arial;">Q 62.1 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/q62.pdf">A homonuclear polar molecule</a><br /><span style="font-family:arial;">SYRA 2.3 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra2.pdf">Electric field impact on ultra-long-range triatomic polar Rydberg molecules</a><br /><br /><b style="font-family: arial;">Weimer, Hendrik</b><br /><span style="font-family:arial;">Q 19.1 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/q19.pdf">Long-range quantum gates for nitrogen-vacancy defect centers in diamond</a><br /><span style="font-family:arial;">SYRA 2.4 </span><a style="font-family: arial;" href="http://www.dpg-verhandlungen.de/2012/stuttgart/syra2.pdf">Supersymmetry in Rydberg-dressed lattice fermions</a><br /></span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-47625424170600757772012-02-16T11:53:00.035-05:002012-02-16T13:29:09.524-05:00ITAMP Talks APS March March 2012<table><tbody>
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</td> <td><div class="MsoNormal"><b>Aspuru-Guzik, Alan</b></div><div class="MsoNormal"><span style="font-family: Times; font-size: small;">V28.00004 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165851"><span style="color: blue;">Nonradiative lifetimes in intermediate band materials -- absence of lifetime recovery</span></a><br />
L35.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162980"><span style="color: blue;">The derivative discontinuity in density functional theory from an electrostatic description of the exchange and correlation potential</span></a><br />
V48.00012 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166069"><span style="color: blue;">Accessing exciton transport in light-harvesting structures with plasmonic nanotip</span></a><br />
V34.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165927"><span style="color: blue;">How much information do ultrafast spectra contain? The case for ultrafast quantum process tomography</span></a><br />
T30.00006 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165266"><span style="color: blue;">Algorithmic Quantum Cooling</span></a><br />
J34.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/161989"><span style="color: blue;">2-Dimensional Fluorescence Spectroscopy: Determining the Temperature-Dependent Conformations of Porphyrin Dimers and Nucleic Acids</span></a><br />
L36.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162983"><span style="color: blue;">Study of excitonic energy transport in thin-film J-aggregates</span></a><br />
W41.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166613"><span style="color: blue;">Absence of quantum oscillations in electronic excitation transfer in the Fenna-Matthews-Olson complex</span></a><br />
J30.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/161945"><span style="color: blue;">Quantum simulator of an open quantum system using superconducting qubits: exciton transport in photosynthetic complexes</span></a><br />
J34.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/161988"><span style="color: blue;">Conformation of self-assembled porphyrin dimers in liposome vesicles by phase-modulation 2D fluorescence spectroscopy</span></a><br />
X17.00004 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166968"><span style="color: blue;">Plasmonic nanotips for spectroscopy with nanometer-scale resolution</span></a><br />
W35.00009 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162973"><span style="color: blue;">Applying state-of-the-art signal processing to time-dependent density functional theory</span></a><br />
B7.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159413"><span style="color: blue;">The Harvard Clean Energy Project: High-throughput screening of organic photovoltaic materials using cheminformatics, machine learning, and pattern recognition</span></a><br />
B7.00001 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159412"><span style="color: blue;">The Harvard Clean Energy Project: High-throughput screening of organic photovoltaic materials using first-principles electronic structure theory</span></a><br />
V35.00004 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165933"><span style="color: blue;">Time-dependent density functional theory for open quantum systems</span></a></span></div><br />
<div class="MsoNormal"><b>Cappellaro, Paola</b></div><div class="MsoNormal">K1.00260 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162487">Composite-pulse magnetometry in the solid-state</a><br />
K1.00308 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162536">Perfect mixed state quantum transport in correlated spin networks</a></div><br />
<div class="MsoNormal"><b>Demler, Eugene<br />
</b>J4.00001 <a href="http://meetings.aps.org/Meeting/MAR12/Event/161598">Non Equilibrium Quantum Criticality: an intuitive approach</a><br />
Z4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/167954">Collective mode of an impurity and a Tonks-Girardeau gas</a><br />
D4.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160357">Clustering of cold polar molecules in arrays of one-dimensional tubes</a><br />
V4.00001 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165538">Doublon production rate by optical lattice modulation for strongly correlated Fermionic atoms</a><br />
D4.00007 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160354">Tunable Superfluidity with Ultracold Polar Molecules on quasi-1D Optical Lattices</a><br />
J4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/161600">Stability of Counterflow Superfluidity</a><br />
A32.00015 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159059">Photo-induced quantum Hall insulators without Landau levels</a><br />
D4.00006 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160353">Quantum Magnetism with Polar Molecules: Tunable Generalized $t$-$J$ Model</a><br />
A8.00011 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158737">Emergence and lifting of frustration for dipolar molecules</a></div><div class="MsoNormal"><br />
<b>Feist, Johannes</b> <br />
D10.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160445">Accessing correlated electron motion on the attosecond timescale</a><br />
V48.00012 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166069">Accessing exciton transport in light-harvesting structures with plasmonic nanotip</a><br />
X17.00004 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166968">Plasmonic nanotips for spectroscopy with nanometer-scale resolution</a><br />
V4.00013 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165550">A Quantum Plasmonic Circuit for Cold Atoms</a><br />
A4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158673">A nanoscale quantum interface for single atoms</a><br />
<br />
</div><b>Laumann, Chris </b><br />
K1.00283 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162511">Topologically Protected Quantum State Transfer in a Chiral Spin Liquid</a><br />
D29.00009 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160683">Long-range quantum gates using dipolar crystals</a><b> </b><br />
T24.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165190">Microscopic Disorder-Based model for non-Abelian Quasi-Particles in $\nu=5/2$ FQH states</a></td></tr>
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</div><div class="MsoNormal"><b>Lemeshko, Mikhail</b><br />
K1.00334 <a href="http://meetings.aps.org/Meeting/MAR12/Event/168987">Sensitive imaging of electromagnetic fields with cold polar molecules</a><br />
<br />
<b>Lukin, Mikhail </b><br />
D4.00007 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160354">Tunable Superfluidity with Ultracold Polar Molecules on quasi-1D Optical Lattices</a><br />
A30.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159025">Towards Probing Living Cell Function with NV Centers in Nanodiamonds</a><br />
D4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160350">Altering Photon Statistics using Strong Rydberg Interactions</a><br />
D4.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160349">Towards single-photon optical nonlinearities using cold Rydberg atoms</a><br />
D4.00006 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160353">Quantum Magnetism with Polar Molecules: Tunable Generalized $t$-$J$ Model</a><br />
A30.00006 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159021">Decoherence imaging of spin ensembles by a scannable single nitrogen-vacancy center in diamond</a><br />
V48.00012 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166069">Accessing exciton transport in light-harvesting structures with plasmonic nanotip</a><br />
A4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158673">A nanoscale quantum interface for single atoms</a><br />
A4.00001 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158671">A Light-Matter Interface with NV Centers</a><br />
V4.00013 <a href="http://meetings.aps.org/Meeting/MAR12/Event/165550">A Quantum Plasmonic Circuit for Cold Atoms</a><br />
A4.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158672">Probing the motion of a mechanical resonator via coherent coupling to a single spin qubit</a><br />
D29.00007 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160681">Room temperature solid-state quantum bit with second-long memory</a><br />
D29.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160679">Optimizing the resolution and the sensitivity of a scanning NV magnetometer</a><br />
D29.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160677">Quantum interference of single photons from two remote Nitrogen-Vacancy centers in diamond</a><br />
D29.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160684">Magnetic imaging of a single electron spin using a scanning NV magnetometer under ambient conditions</a><br />
X17.00004 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166968">Plasmonic nanotips for spectroscopy with nanometer-scale resolution</a><br />
W41.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/166614">Progress Towards Room-Temperature Electron Spin Detection in Biological Systems</a><br />
D29.00013 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160687">Spectroscopy of composite solid-state spin environments for improved metrology with spin ensembles</a><br />
B4.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159368">Coupling a single spin in diamond to the quantum motion of a mechanical cantilever</a><br />
L10.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162659">Quantum optics with solid-state atom-like systems</a><br />
A30.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159020">Cooling Nuclear Spins in Diamond via Dark State Spectroscopy</a><br />
A30.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159018">Quantum Optics with Spins and Photons in Diamond</a><br />
<br />
<b>Mathy, Charles</b><br />
Z4.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/167954">Collective mode of an impurity and a Tonks-Girardeau gas</a><br />
<br />
<div class="MsoNormal"><b>Onofrio, Roberto<br />
</b>B1.00002 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159336">Four techniques to achieve deeper Fermi degeneracy in Fermi-Bose mixtures</a><br />
B1.00003 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159337">Optimized sympathetic cooling of atomic mixtures via fast adiabatic strategies</a></div></div><div class="MsoNormal"><b>Rittenhouse, Seth</b><br />
D4.00011 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160358">A dielectric superfluid of polar molecules</a></div><div class="MsoNormal"><br />
</div><b>Safavi-Naini</b><br />
A. A4.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158680">An ab-initio microscopic theory of anomalous heating in planar ion traps</a><br />
D4.00013 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160360">Paired Phases of Dipoles in a Bilayer System</a><br />
<br />
<b>Sadeghpour, H.R. </b><br />
A4.00010 <a href="http://meetings.aps.org/Meeting/MAR12/Event/158680">An ab-initio microscopic theory of anomalous heating in planar ion traps</a><br />
D4.00013 <a href="http://meetings.aps.org/Meeting/MAR12/Event/160360">Paired Phases of Dipoles in a Bilayer System</a><br />
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</style> </div><b>Weimer, Hendrik<br />
</b>K1.00283 <a href="http://meetings.aps.org/Meeting/MAR12/Event/162511">Topologically Protected Quantum State Transfer in a Chiral Spin Liquid</a><br />
<div class="MsoNormal"><br />
<div class="MsoNormal"><b>Yelin, Susanne<br />
</b>A30.00005 <a href="http://meetings.aps.org/Meeting/MAR12/Event/159020">Cooling Nuclear Spins in Diamond via Dark State Spectroscopy</a></div></div>ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-7377710936340471322012-01-09T18:37:00.001-05:002012-01-09T18:45:58.957-05:00ITAMP/B2 Winter Graduate School on AMO Physics, Jan 8-20, 2012The 1st morning session of the school went quite well. There were talks by Jun Ye (JILA) on control of light; how ultrafast laser pulses could be used to produce ultrastable frequency combs, and how different frequency scales, from UVU could be referenced to IR, a preview for his 2nd lecture tomorrow on controlling atomic matter with light. The 2nd talk was given by Pierre Meystre (replacing Mette Gaarde who could not be here) on cooling of optomechanical systems. This emerging subject of inquiry in AMO sciences has mushroomed over the last few years b/c a number of groups have succeeded in bringing the center of mass motion of nearly macroscopic objects to the quantum ground level. Pierre described what could be investigated with ground state objects, ala beyond ground state cooling.<br />
<br />
The afternoon talks are now being given by Ivan Deutsch (UNM) and Han Pu (Rice). Han is giving a rigorous account of theory of laser cooling.<br />
<br />
The students appear enthusiastic and engage the faculty with questions. The settings are beautiful- the mornings are quite and a bit chilly, and warming day hours which follow. The accommodations are first rate and comfortable.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com3tag:blogger.com,1999:blog-60030803362389929.post-60015801881791994112011-11-25T11:01:00.007-05:002011-11-26T13:19:40.318-05:00A homonuclear molecule with a permanent dipole momentTraditional wisdom tells us that homonuclear molecules cannot have a permanent dipole moment. However, when one of the atoms in a diatomic molecule is in a highly excited Rydberg state, the exchange symmetry between the two atoms is broken. In a <a href="http://www.sciencemag.org/content/334/6059/1110.abstract">new article</a> published today in Science [1], ITAMP postdoc Seth Rittenhouse and scientist Hossein Sadeghpour in collaboration with groups from the Max-Planck-Institut für Physik komplexer Systeme and the University of Stuttgart, we describe the first direct measurement of a homonuclear, diatomic molecule with a permanent electric dipole moment.<br />
<br />
Giant Rydberg molecules, first predicted over a decade ago [2], can bond courtesy of frequent scattering of the Rydberg electron off of a ground state atom. These molecules were later observed spectroscopically in s-wave dominated states [3]. However, because the electronic distribution was assumed to be isotropic, it was thought that this type of molecule would not have any polar behavior.<br />
<br />
In our new work, we show that in truth a very small amount of the so-called "trilobite" state is admixed to the molecular electronic state resulting in appreciable dipole moments (on the order od 1 Debye). This prediction is born out by the observation of a linear Stark shift a small fields in high precision spectroscopic measurements of the Stark map of homonuclear rubidium Rydberg molecules.<br />
<br />
<a href="http://4.bp.blogspot.com/-nk4zG5qt_nY/TtAqBojr3vI/AAAAAAAAABg/Vd5nKr7MGNw/s1600/WFs.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5679085337669525234" src="http://4.bp.blogspot.com/-nk4zG5qt_nY/TtAqBojr3vI/AAAAAAAAABg/Vd5nKr7MGNw/s320/WFs.png" style="cursor: pointer; float: left; height: 103px; margin: 0pt 10px 10px 0pt; width: 311px;" /></a><span style="font-size: 85%;">(a) The electron density for a Giant homonuclear molecule is show in cylindrical coordinates. (b) The trilobite-like electron density is shown after the isotropic amplitude has been subtracted. In both figures the Rb Rydberg core is at z = ρ = 0, the while the ground state atom is located z = 1900 atomic units</span> <span style="font-size: x-small;">(figure from Ref. [1])</span>.<br />
<br />
<br />
References:<br />
[1] W. Li, T. Pohl, J. M. Rost, S. T. Rittenhouse, H. R. Sadeghpour, J. Nipper, B. Butscher, J. B. Balewski, V. Bendkowsky, R. Low and T. Pfau, <a href="http://www.sciencemag.org/content/334/6059/1110.abstract"><span style="font-style: italic;">Science</span> <span style="font-weight: bold;">334</span>, 1110 (2011)</a>.<br />
<br />
[2] H. R. Sadeghpour, A. S. Dickinson and C. H. Greene, <a href="http://prl.aps.org/abstract/PRL/v85/i12/p2458_1"><span style="font-style: italic;">Phys. Rev Lett.</span> <span style="font-weight: bold;">85</span>, 2458 (2000)</a>.<br />
<br />
[3] V. Bendkowsky <span style="font-style: italic;">et al.</span>, <a href="http://www.nature.com/nature/journal/v458/n7241/full/nature07945.html"><span style="font-style: italic;">Nature</span> <span style="font-weight: bold;">458</span>, 1005 (2009)</a>.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-37806791841671259892011-09-01T14:45:00.001-04:002011-09-01T14:45:51.306-04:00Watching correlated electron motion with attosecond pulses<div style="text-align: justify;">
In a <a href="http://dx.doi.org/10.1103/PhysRevLett.107.093005">recent paper published in Physical Review Letters</a>, we propose a new approach to observe the correlated motion of two electrons on the attosecond timescale. In this pump-probe setup, two identical extreme-ultraviolet light pulses with a duration of just a few hundred attoseconds (1 as = 10<sup>-18</sup> s) are sent onto a helium atom. We expect that with the continuing development of intense attosecond
pulses, this kind of experiment could be performed in the next few
years. Most current experiments use a strong
few-femtosecond infrared field in combination with an
extreme-ultraviolet attosecond pulse. These rely on highly nonlinear
effects
to attain subcycle time resolution within the infrared pulse. In contrast
to such setups, the wave packet dynamics are not modified by the
fields when using two extreme ultraviolet pulses. The proposed measurement would thus be one of the first experiments to directly observe
field-free correlated electron dynamics in atoms on their natural
attosecond timescale. </div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
In our proposed setup, the first (pump) pulse excites a coherent wave packet of <i>doubly excited states</i>. These are prototypical examples of highly correlated states where the two electrons influence each other strongly. After letting this wave packet evolve for some time, the second (probe) pulse ejects both electrons. By repeating the sequence many times with different time delays between the two pulses, a "movie" of the doubly excited wave packet can be created frame by frame. </div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
In the paper, we show that by measuring only <i>one</i> of the two ejected electrons and counting only those electrons within a specific energy interval, it is possible to gain direct access to an observable related to the dynamics of <i>both</i> electrons: the distance between them at the moment of ionization.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
There is one further problem to overcome: Both steps in the pump-probe sequence only occur with small probabilities. Both in double excitation (pump) and in double ionization (probe), absorption of <i>one</i> photon has to lead to a <i>two</i>-electron transition. As a photon only "talks" to one electron directly, these two-electron transitions are quite unlikely. We show that one can exploit quantum interference to increase the magnitude of the signal: Since the pump and probe pulses are identical, absorption of two photons from just one of them leads to the same final states as absorption of one photon from each pulse. This "direct" pathway, where each photon ejects one electron, is orders of magnitude more likely than the more interesting pump-probe pathway. However, it does not represent an incoherent background that masks the signal of interest. Instead, it provides a coherent <i>reference pathway </i>that<i> </i>the pump-probe pathway through the doubly excited states interferes with. The amplitude of the interference term is about a hundred times larger than the magnitude of the pump-probe signal by itself, thus providing an experimentally more accessible signal.</div>
<div style="text-align: justify;">
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<div style="text-align: justify;">
Reference: J. Feist, S. Nagele, C. Ticknor, B. I. Schneider, L. A. Collins, and J. Burgdörfer, <a href="http://dx.doi.org/10.1103/PhysRevLett.107.093005">Phys. Rev. Lett. 107, 093005 (2011)</a></div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-22695089952846254232011-08-30T14:38:00.002-04:002011-08-30T14:42:30.161-04:00<a href="http://physics.aps.org/files/image_uploads/5696/medium_e1.png" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img style="float:left; margin:0 10px 10px 0;cursor:pointer; cursor:hand;width: 300px; height: 135px;" src="http://physics.aps.org/files/image_uploads/5696/medium_e1.png" border="0" alt="" /></a><span class="Apple-style-span" style="font-family: arial, helvetica, sans-serif; font-size: 10px; line-height: 17px; ">What is causing trapped ions to heat up? In an ion trap, electrodes (shown here in gold) produce electric fields that confine the ion (green sphere) to a small volume. Randomly fluctuating dipoles on the surface of these electrodes generate electric field noise. The dipoles form when single atoms adsorb on the metal surface. Vibrations (phonons) in the metal cause the dipoles (purple arrows) to fluctuate. Ions trapped in the vicinity of the metal surface sense these electric field changes and heat up.</span>
<br /><h1 style="padding-top: 10px; padding-right: 0px; padding-bottom: 0.375em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: bold; font-size: 1.6em; line-height: 1.3em; color: rgb(39, 20, 92); clear: left; ">
<br /></h1><h1 style="padding-top: 10px; padding-right: 0px; padding-bottom: 0.375em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: bold; font-size: 1.6em; line-height: 1.3em; color: rgb(39, 20, 92); clear: left; ">Viewpoint</h1><p class="topics" style="padding-top: 0.2em; padding-right: 0px; padding-bottom: 0.2em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0.8em; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: bold; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1.75em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(230, 230, 230); border-top-width: 1px; border-top-style: solid; border-top-color: rgb(230, 230, 230); "><a class="topic" href="http://physics.aps.org/browse/subjectarea/atomicandmolecularphysics" style="padding-top: 0px; padding-right: 6px; padding-bottom: 0px; padding-left: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(153, 0, 0); text-decoration: none; background-image: url(http://physics.aps.org/sites/physics.staging.ridge.aps.org/themes/PHYSICS/graphics/icon_bullet.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; background-position: 0px 0.5em; background-repeat: no-repeat no-repeat; ">Atomic and Molecular Physics</a></p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: normal; color: rgb(0, 0, 0); line-height: 1.75em; font-family:arial, helvetica, sans-serif;font-size:0.75em;"><span class="reference" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: bold; display: block; ">Physics 4, 66 (2011)</span>DOI: 10.1103/Physics.4.66</p><span class="Apple-style-span" style=" ;font-family:Times;font-size:medium;"><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rfr_id=info%3Asid%2Faps.org&rft.title=Physics&rft.stitle=Physics&rft.atitle=All+that+is+gold+does+not+glitter&rft.date=2011-08-22&rft.volume=4&rft.spage=66&rft.aufirst=Nikos&rft.aulast=Daniilidis&rft_id=info:doi/10.1103%2FPhysics.4.66" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "></span></span><h1 class="title" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.375em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: bold; font-size: 1.6em; line-height: 1.3em; color: rgb(0, 0, 0); clear: left; ">All that is gold does not glitter</h1><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: normal; color: rgb(0, 0, 0); line-height: 1.75em; font-family:arial, helvetica, sans-serif;font-size:0.75em;"><span class="author" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: bold; display: block; "><a href="http://physics.aps.org/authors/nikos_daniilidis" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(153, 0, 0); text-decoration: none; ">Nikos Daniilidis</a> and <a href="http://physics.aps.org/authors/hartmut_h%C3%A4ffner" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(153, 0, 0); text-decoration: none; ">Hartmut Häffner</a></span><i style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Department of Physics, University of California, Berkeley, CA 94720-7300, USA</i></p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: normal; color: rgb(0, 0, 0); line-height: 1.75em; font-family:arial, helvetica, sans-serif;font-size:0.75em;"><span class="reference" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-weight: bold; display: block; ">Published August 22, 2011</span></p><div class="abstract" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-style: italic; font-family: Times; font-size: medium; "><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1.75em; ">A microscopic model offers new insight into a pernicious source of electric field noise in ion traps.</p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1.75em; "><a href="http://physics.aps.org/articles/v4/66">More here .... </a></p></div><div class="orig-article" style="padding-top: 1em; padding-right: 1em; padding-bottom: 0.5em; padding-left: 1em; margin-top: 1em; margin-right: 0em; margin-bottom: 1em; margin-left: 0em; background-color: rgb(239, 239, 239); font-family: Times; font-size: medium; "><h3 style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.7em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: bold; font-size: 0.85em; line-height: 1.3em; color: rgb(0, 0, 0); ">A Viewpoint on:</h3><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1em; "><a href="http://link.aps.org/doi/10.1103/PhysRevA.84.023412" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(153, 0, 0); text-decoration: none; "><b style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Microscopic model of electric-field-noise heating in ion traps</b></a></p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1em; ">A. Safavi-Naini, P. Rabl, P. F. Weck, and H. R. Sadeghpour</p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1em; ">Phys. Rev. A <b style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">84</b>, 023412 (2011) – Published August 22, 2011</p><p style="padding-top: 0px; padding-right: 0px; padding-bottom: 0.8em; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: arial, helvetica, sans-serif; font-weight: normal; font-size: 0.75em; color: rgb(0, 0, 0); line-height: 1em; "><a href="http://physics.aps.org/pdf/10.1103/PhysRevA.84.023412.pdf" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(153, 0, 0); text-decoration: none; ">Download PDF</a> (free)</p><div>
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<br /></div></div>HRShttp://www.blogger.com/profile/00811609813518037383noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-38467975250875655492011-08-26T13:10:00.002-04:002011-08-26T13:15:33.108-04:00Artificial Atoms Can Do More Than AtomsIn a recently published work in Physical Review Letters, we have shown that artificial atoms made of a large number of single atoms can exhibit superior properties compared to their individual counterparts. Our results provide a way to novel applications in photonic devices used for quantum communication and quantum metrology.
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<br />In our work, we investigate an ensemble of strongly interacting atoms as found in Rydberg atoms or semiconductor quantum dots. The interaction of these systems with light can be described by an artificial atom with only two energy levels. However, when applying controlled noise to the system, this approximation breaks down and additional energy levels have to be taken into account. If a light beam is then sent through the system, these additional levels result in exactly one photon being removed from the beam. This single photon absorption process can be used in number resolving photon counters or for the creation of non-classical states of light.
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<br />Reference: J. Honer, R. Löw, H. Weimer, T. Pfau, H. P. Büchler, <a href="http://dx.doi.org/10.1103/PhysRevLett.107.093601">Phys. Rev. Lett. 107, 093601 (2011)</a>.
<br />See also: <a href="http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.107.093601">Synopsis in Physics</a>
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<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-22748327642942347892011-06-06T11:46:00.011-04:002011-06-07T10:17:54.848-04:00ITAMP 2011 DAMOP presentations (in Atlanta, GA)<h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span><span style="font-size: small;"><b>Babb</b></span></h3><div style="margin-top: 0px;">10:30 AM–12:30 PM, Tuesday, June 14, 2011<br />
Room: A705<br />
Chair: Ed Eyler, University of Connecticut</div><div style="margin-top: 0px;">Abstract: B5.00007 : Partial derivatives of eigenvalues without finite differences</div>11:42 AM–11:54 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147020<br />
<br />
<span style="font-size: small;"><b>Babb</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: E1.00059 : Long-Range Three-Body Dispersion Interactions</div><span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147137</span><br />
<br />
<span style="font-size: small;"><b>Capogrosso</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Wednesday, June 15, 2011<br />
Room: A704</div><div style="margin-top: 0px;">Chair: Nathan Gemelke, Pennsylvania State University</div><div style="margin-top: 0px;">Abstract: H4.00003 : Pair-Supersolidity of Dipoles in a Bilayer System</div>8:42 AM–8:54 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147294<br />
<br />
<span style="font-size: small;"><b>Capogrosso</b></span> <br />
<div style="margin-top: 0px;">10:30 AM–12:30 PM, Thursday, June 16, 2011<br />
Room: A602</div><div style="margin-top: 0px;">Chair: Markus Greiner, Harvard University</div><div style="margin-top: 0px;">Abstract: N2.00005 : Quantum magnetic phases in harmonically trapped two-component bosons</div>11:18 AM–11:30 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147674<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Demler</b></span></div><div style="margin-top: 0px;">10:30 AM–12:30 PM, Tuesday, June 14, 2011<br />
Room: A704<br />
Chair: Benjamin Lev, University of Illinois at Urbana-Champaign</div><div style="margin-top: 0px;">Abstract: B4.00005 : Quantum Magnetism with Polar Alkali Dimers</div>11:54 AM–12:06 PMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147010<br />
<br />
<span style="font-size: small;"><b>Demler</b></span><br />
4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
<div style="margin-top: 0px;">Room: Atrium Ballroom BC<br />
Abstract: E1.00012 : Emulating Quantum Magnetism and t--J Models in Systems of Ultracold Polar Molecules</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147090<br />
<br />
<span style="font-size: small;"><b>Demler</b></span> <br />
0:30 AM–12:30 PM, Thursday, June 16, 2011<br />
Room: A705<br />
Chair: Josh Zirbel, University of Illinois at Urbana-Champaign<br />
Abstract: N5.00003 : Non-Equilibrium Dynamics of 1d Bose Gases Studied via Noise Distributions<br />
10:54 AM–11:06 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147699<br />
<br />
<span style="font-size: small;"><b>Demler</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A705<br />
Chair: Alex Kuzmich, Georgia Institute of Technology</div><div style="margin-top: 0px;">Abstract: T5.00006 : Robust optical delay lines via topological protection</div>9:00 AM–9:12 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147977<br />
<br />
<span style="font-size: small;"><b>Demler</b></span> <br />
<div style="margin-top: 0px;"> 8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A706<br />
Chair: Georg Raithel, University of Michigan</div><div style="margin-top: 0px;">Abstract: T6.00007 : Majorana Fermions in Cold Atom Quantum Wires</div>9:48 AM–10:00 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147989<br />
<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Feist</b></span></div><div style="margin-top: 0px;">2:00 PM–4:00 PM, Wednesday, June 15, 2011<br />
Room: A705</div><div style="margin-top: 0px;">Chair: Arvinder Sandhu, University of ArizonaAbstract: K5.00003 : Attosecond pump-probe of doubly excited states in helium</div>2:24 PM–2:36 PM http://meetings.aps.org/Meeting/DAMOP11/Event/147406<br />
<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Feist</b></span></div><div style="margin-top: 0px;">2:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: A602</div><div style="margin-top: 0px;">Chair: David Reis, SLAC and Standford University</div><div style="margin-top: 0px;">Abstract: P2.00003 : Time-resolved photoemission by attosecond streaking: extraction of time information</div>2:42 PM–2:54 PM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147726 <br />
<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Gacesa</b></span></div><div style="margin-top: 0px;">8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A601</div><div style="margin-top: 0px;">Chair: Steven Manson, Georgia State University</div><div style="margin-top: 0px;">Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$</div><div style="margin-top: 0px;">9:36 AM–9:48 AM</div> http://meetings.aps.org/Meeting/DAMOP11/Event/147948<br />
<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Kharchenko</b></span></div><div style="margin-top: 0px;">8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A601</div><div style="margin-top: 0px;">Chair: Steven Manson, Georgia State University</div><div style="margin-top: 0px;">Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$</div>9:36 AM–9:48 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147948<br />
<br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b>Kuznetsova</b></span></div><div style="margin-top: 0px;">8:00 AM–10:00 AM, Thursday, June 16, 2011<br />
Room: A705<br />
Chair: Emily Edwards, JQI and University of Maryland</div><div style="margin-top: 0px;">Abstract: M5.00007 : Cluster state generation using long-range interactions</div>9:12 AM–9:24 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147652<br />
<br />
<span style="font-size: small;"><b>Kuznetsova</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates</div><span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147915</span><br />
<h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span><span style="font-size: small;"><b>Loreau</b></span></h3><div style="margin-top: 0px;">10:30 AM–12:30 PM, Wednesday, June 15, 2011<br />
Room: A703</div><div style="margin-top: 0px;">Chair: Francis Robicheaux, Auburn University</div><div style="margin-top: 0px;">Abstract: J3.00009 : Isotope effect on charge transfer in collisions of H with He$^+$ and He$^{2+}$</div>12:06 PM–12:18 PM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147340<br />
<h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span><span style="font-size: small;"><b>Lukin</b></span></h3>10:30 AM–12:30 PM, Tuesday, June 14, 2011<br />
Room: A703<br />
Chair: Gretchen Campbell, JQI and NIST<br />
Abstract: B3.00009 : Sub-wavelength optical trapping and manipulation using far-field optics<br />
12:06 PM–12:18 PM http://meetings.aps.org/Meeting/DAMOP11/Event/147003<br />
<br />
<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">10:30 AM–12:30 PM, Tuesday, June 14, 2011<br />
Room: A704</div><div style="margin-top: 0px;">Chair: Benjamin Lev, University of Illinois at Urbana-Champaign</div><div style="margin-top: 0px;">Abstract: B4.00005 : Quantum Magnetism with Polar Alkali Dimers</div>11:54 AM–12:06 PM<span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147010</span><br />
<br />
<span style="font-size: small;"><b>Lukin</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00012 : Emulating Quantum Magnetism and t--J Models in Systems of Ultracold Polar Molecules</div><span style="font-size: small;"><b> </b>http://meetings.aps.org/Meeting/DAMOP11/Event/147090</span><br />
<br />
<span style="font-size: small;"><b>Lukin</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00096 : Towards room temperature magnetic sensing of a single electron spin in biological systems</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147174</div><br />
<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b> </b></span>4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00042 : A Nanoplasmonic Lattice for Quantum Simulation with Cold Atoms</div><span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147120</span><br />
<br />
<span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><span style="font-size: small;"><b> </b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00097 : All optical real-time measurement and preparation of nuclear spin states around an individual NV center in diamond</div><span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147175</span><br />
<br />
<span style="font-size: small;"> </span><span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;"><span style="font-size: small;"><b> </b></span>4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00098 : Measurement-Based Nuclear Spin Cooling in NV Centers</div><div style="margin-top: 0px;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147176</div><div style="margin-top: 0px;"><br />
</div><span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00099 : Sensing thermal motion of a mechanical resonator using a single spin qubit in diamond</div><span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147177</span><br />
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<span style="font-size: small;"><b>Lukin</b></span><span style="font-size: small;"><b> </b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00100 : Long-lived solid-state room-temperature quantum memory</div><span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147178 <b><br />
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<span style="font-size: small;"><b> </b></span><br />
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<span style="font-size: small;"><b>Lukin</b></span><span style="font-size: small;"><b> </b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00148 : Topologically Protected Quantum State Transfer</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147226 </div><br />
<span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><br />
<span style="font-size: small;"><b>4 </b></span>:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: E1.00152 : Coupling of NV centers to microscopic cavities<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147230 <br />
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<span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Wednesday, June 15, 2011<br />
Room: A602<br />
Chair: Tatjana Curcic, Air Force Office of Scientific Research</div><div style="margin-top: 0px;">Abstract: H2.00001 : Optics with Nitrogen Vacancy Centers in Diamond</div>8:00 AM–8:30 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147273<br />
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<span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Wednesday, June 15, 2011<br />
Room: A602<br />
Chair: Tatjana Curcic, Air Force Office of Scientific Research</div><div style="margin-top: 0px;">Abstract: H2.00002 : Magnetic field imaging with NV ensembles</div>8:30 AM–8:42 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147274<br />
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<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Wednesday, June 15, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: L1.00108 : Hybrid Devices for Cavity QED in Solid State Systems</div><span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147538</span><br />
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<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Thursday, June 16, 2011<br />
Room: A705<br />
Chair: Emily Edwards, JQI and University of Maryland</div><div style="margin-top: 0px;">Abstract: M5.00004 : Long-range quantum gates using external symmetry breaking</div>8:36 AM–8:48 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147649 <br />
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<span style="font-size: small;"><b> Lukin</b></span><span style="font-size: small;"><b> </b></span> <br />
4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
<div style="margin-top: 0px;">Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: Q1.00121 : Nanowire Plasmon Resonators</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147888<br />
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<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: Q1.00137 : A nanoscale quantum interface for single atoms</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147905 </div><br />
<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A703<br />
Chair: Steve Rolston, JQI and University of Maryland</div><div style="margin-top: 0px;">Abstract: T3.00010 : Dark-State Polaritons with Rydberg Interactions</div>9:48 AM–10:00 AM<span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147965</span><br />
<span style="font-size: small;"><b> </b></span><br />
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<span style="font-size: small;"><b> Lukin</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A705<br />
Chair: Alex Kuzmich, Georgia Institute of Technology</div><div style="margin-top: 0px;">Abstract: T5.00006 : Robust optical delay lines via topological protection</div>9:00 AM–9:12 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147977<br />
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<span style="font-size: small;"><b> Lukin</b></span><br />
8:00 AM–10:00 AM, Friday, June 17, 2011<br />
<div style="margin-top: 0px;">Room: A706<br />
Chair: Georg Raithel, University of Michigan</div><div style="margin-top: 0px;">Abstract: T6.00007 : Majorana Fermions in Cold Atom Quantum Wires</div>9:48 AM–10:00 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147989<br />
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<div style="margin-top: 0px;"><span style="font-size: small;"><b>Mathy</b></span></div><div style="margin-top: 0px;">8:00 AM–10:00 AM, Wednesday, June 15, 2011<br />
Room: A601</div><div style="margin-top: 0px;">Chair: Ken O'Hara, Pennsylvania State University</div><div style="margin-top: 0px;">Abstract: H1.00003 : Universal features of strongly polarized mass imbalanced fermi gases</div>8:24 AM–8:36 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147264<br />
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<div style="margin-top: 0px;"><span style="font-size: small;"><b>Rittenhouse</b></span></div><div style="margin-top: 0px;">4:00 PM–4:00 PM, Wednesday, June 15, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: L1.00004 : A Dielectric Superfluid of Polar Molecules</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147434<br />
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<span style="font-size: small;"><b>Rittenhouse</b></span> <br />
<div style="margin-top: 0px;">2:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: A706</div><div style="margin-top: 0px;">Chair: Doerte Blume, Washington State UniversityAbstract: P6.00003 : Probing universal few-body dynamics</div>3:00 PM–3:30 PM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147764<br />
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<span style="font-size: small;"><b>Rittenhouse</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: Q1.00008 : Ultralong-range polyatomic Rydberg molecules formed by a polar perturber</div><span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147774</span><br />
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<span style="font-size: small;"><b>Rittenhouse</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147915 </div><h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span></h3><h3 style="margin-bottom: 0px;"><span style="font-size: small;">Sadeghpour</span></h3>4:00 PM–4:00 PM, Wednesday, June 15, 2011<br />
<div style="margin-top: 0px;">Room: Atrium Ballroom BC<br />
Abstract: L1.00151 : Self-broadening of helium $^1D$ and $^3D$ lines</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147582</div><div style="margin-top: 0px;"></div><h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span></h3><h3 style="margin-bottom: 0px;"><span style="font-size: small;">Sadeghpour</span></h3><div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: Q1.00008 : Ultralong-range polyatomic Rydberg molecules formed by a polar perturber</div><div style="margin-top: 0px;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147774</div><h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span></h3><h3 style="margin-bottom: 0px;"><span style="font-size: small;">Sadeghpour</span></h3><div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates</div><div style="margin-top: 0px;">http://meetings.aps.org/Meeting/DAMOP11/Event/147915</div><h3 style="margin-bottom: 0px;"><span style="font-size: small;"> </span></h3><h3 style="margin-bottom: 0px;"><span style="font-size: small;">Sadeghpour</span></h3><div style="margin-top: 0px;"></div><div style="margin-top: 0px;">10:30 AM–12:30 PM, Wednesday, June 15, 2011<br />
Room: A601<br />
Chair: Jake Taylor, JQI and NISTAbstract: J1.00003 : An ab-initio model of anomalous heating in planar ion traps</div>10:54 AM–11:06 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147318<br />
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<span style="font-size: small;"><b>Weimer </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: E1.00148 : Topologically Protected Quantum State Transfer</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147226<br />
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<div style="margin-top: 0px;"><span style="font-size: small;"><b>Weimer</b></span></div><div style="margin-top: 0px;">8:00 AM–10:00 AM, Thursday, June 16, 2011<br />
Room: A705<br />
Chair: Emily Edwards, JQI and University of Maryland</div><div style="margin-top: 0px;">Abstract: M5.00004 : Long-range quantum gates using external symmetry breaking</div>8:36 AM–8:48 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147649 <br />
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<div style="margin-top: 0px;"><span style="font-size: small;"><b>Yelin</b></span></div><div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00097 : All optical real-time measurement and preparation of nuclear spin states around an individual NV center in diamond</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147175<br />
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<span style="font-size: small;"><b>Yelin</b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Tuesday, June 14, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: E1.00098 : Measurement-Based Nuclear Spin Cooling in NV Centers</div><span style="font-size: small;">http://meetings.aps.org/Meeting/DAMOP11/Event/147176</span><br />
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<span style="font-size: small;"><b>Yelin</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Wednesday, June 15, 2011<br />
Room: A703<br />
Chair: Ivan Deutsch, University of New Mexico</div><div style="margin-top: 0px;">Abstract: H3.00006 : Superradiance in spin-J atoms: Effects of multiple atomic levels</div>9:00 AM–9:12 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147286 <br />
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<span style="font-size: small;"><b>Yelin</b></span><br />
<div style="margin-top: 0px;">8:00 AM–10:00 AM, Thursday, June 16, 2011<br />
Room: A705<br />
Chair: Emily Edwards, JQI and University of Maryland</div><div style="margin-top: 0px;">Abstract: M5.00007 : Cluster state generation using long-range interactions</div>9:12 AM–9:24 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147652 <br />
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<span style="font-size: small;"><b>Yelin</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: Q1.00136 : On nearest-neighbor interactions of cold polar molecules in two-color arrays</div><span style="font-size: small;"> http://meetings.aps.org/Meeting/DAMOP11/Event/147904</span><br />
<br />
<span style="font-size: small;"><b>Yelin</b></span><span style="font-size: small;"><b> </b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Thursday, June 16, 2011<br />
Room: Atrium Ballroom BC</div><div style="margin-top: 0px;">Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates</div> http://meetings.aps.org/Meeting/DAMOP11/Event/147915<br />
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<span style="font-size: small;"> </span><span style="font-size: small;"><b>Zhang</b></span><br />
<div style="margin-top: 0px;">4:00 PM–4:00 PM, Wednesday, June 15, 2011<br />
Room: Atrium Ballroom BC<br />
Abstract: L1.00151 : Self-broadening of helium $^1D$ and $^3D$ lines</div>http://meetings.aps.org/Meeting/DAMOP11/Event/147582<br />
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<div style="margin-top: 0px;"><span style="font-size: small;"><b>Zhang </b></span></div><div style="margin-top: 0px;"><span style="font-size: small;"><b> </b></span>8:00 AM–10:00 AM, Friday, June 17, 2011<br />
Room: A601</div><div style="margin-top: 0px;">Chair: Steven Manson, Georgia State University</div><div style="margin-top: 0px;">Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$</div>9:36 AM–9:48 AM<br />
http://meetings.aps.org/Meeting/DAMOP11/Event/147948<br />
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</div><div style="margin-top: 0px;"></div>ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-26779555442670692472011-02-09T10:16:00.000-05:002011-02-09T10:16:24.981-05:00talk by Swati SinghSwati is talking about hybrid approaches to quantum mechanical cooling, in this case to a BEC as the medium. Phase contrast imaging was used by Stamper-Kurn and <span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; color: #333333;"><span class="Apple-style-span" style="font-family: Times, 'Times New Roman', serif;">Mukund Vengalattore to major the local spin domains in BEC. She is studying the feasibility of measuring the backaction.</span></span><br />
<br />
<span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; color: #333333;"><span class="Apple-style-span" style="font-family: Times, 'Times New Roman', serif;"></span></span>Photon scattering losses when objects are levitated to minimize environmental losses, enter the picture. Dipole scattering is not the major issue, as the losses are mostly in the forward direction. Motional squeezing in cantilevers with dipole-dipole interaction, is being discussed. The non-linearity of dipolar interaction is used.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-74443386614914909152011-02-08T09:32:00.001-05:002011-02-08T09:40:28.315-05:00talk by Dan BrooksHe is talking about a microchip trap coupled to a cavity with an optomechanical hamiltonian containing both linear and quadratic couplings of photon and atomic COM. The detuning is about 20 MHz from the cavity resonance, with coupling parameters of order unity (small mass and Young's modulus). In linear coupling regime, the OM power intensity shows a dip when the trap is filled, due to so-called ponderomotive squeezing. The oscillations in the COM motion include a lot of mode excitations and likely the bath mode has frequency dependence.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-76821799070779565852011-02-07T12:11:00.000-05:002011-02-07T12:11:25.386-05:00talk by Oriol Romero-IsartOriol is talking about matter wave interferometry with levitating microspheres- real Sch. cats. Two strategies exist for quantum superposition: use the inherent non-linearity or inject non-linearity (with light, for instance). The measurement is done in analogy with atomic physics through "time of flight". Can optomechanics help with interferometry? First cooling, then expansion by TOF, and measure by putting the bead at the node of the cavity. The, allow for more TOF, and measurement of the position. The coupling to the cavity can done thru. linear or quadratic coupling. Using larger matter waves can extend the coupling too. The most important limiting factor is pressure.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-42894865043551455692011-02-07T11:34:00.000-05:002011-02-07T11:34:20.852-05:00talk by Mark RaizenMark is discussing how the Brownian motion of macroscopic objects can be controlled. Fabricated microsphere (~ 1 micron diameter) are launched in high voltage and shaken off in air. The largest force turns out to be van der Waals force. The beads scatter photons in the focus of the laser beam. The power spectra of a 3.01 micron bead were shown. The time scale for a 3 micron silica instantaneous motion (velocity) is about 1.2 micro-sec for water and 56 micro-sec for air, giving a resolution restriction of about 100 nano-sec and 4 pico-meter for H_2O and more forgiving for air. The test of equipartition theorem is confirmed.<br />
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Now the challenge is to confirm the Brownian motion is water. Preliminary results appear to show ballistic motion- possible breakdown of the equipartition theorem? It shall be seen.<br />
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Moving toward the quantum limit; mK cooling of microbeads has been achieved. In arXiv, accepted for publication. Applications: spraying charges and using as thermometer, or for sympathetic cooling of antihydrogen.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-81732215751423903192011-02-07T10:07:00.001-05:002011-02-07T10:31:53.717-05:00on talk by Markus AspelmayerMarkus is reviewing hi-quality micromechanical systems with atmospheric pressure, 100 ng masses, and 10^-3 N/m spring constants. The mechanical motion is carried away by photon emission from the system.<br />
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The non-Markovian nature of the mechanical motion was referred to, as well as single-photon strong coupling beyond the ground state.<br />
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The foundational aspect, quantum processing, and quantum metrology are tied here.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-32138341625095646432011-02-07T09:24:00.010-05:002011-02-07T09:40:50.772-05:00talk by Peter ZollerPeter is reviewing the different schemes for coupling of mechanical oscillators to optical fields and specifically on two topics:<br />
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1 - optomechanical transducer for quantum communication, as a way to couple/interface atomic/solid state nodes- in which local computing is done- and transfer them to each other. The implementation of already stationary qubit transfer to other nodes (flying qubit) can be done with --- stay tuned, the webcast audio is being fixed! --- Cascading quantum systems transform to the interaction picture, where there's now a quantum noise term, describing collective decay (Linblad master equation for qubit). There's a unidirectional term in H which describes the emitted photon transfer to the other atom/node.<br />
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more on Peter's talk ...<br />
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2 - free-space interactions with atoms (in optical lattices). The idea of coupling a cryo-oscillator to an OL under UHV. The backaction of the quantum oscillation of the mirror on the motion of atoms in OL leads to jitter of the optical field and gets a quantum noise. More like the cascading quantum system- a quantum stochastic Schroedinger equation with time delay, which describes the unbalanced atomic motion in the laser field, coupled to the mirror which introduces a phase.ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-38909523433036625912011-02-07T04:29:00.000-05:002011-02-07T04:29:18.273-05:00watch this space (today thru. Wed) for blogs on the ITAMP Optomechanics workshopwatch this space for blogs on the ITAMP Optomechanics workshop!ITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-79234784808300902862010-12-30T12:50:00.002-05:002010-12-30T13:02:17.174-05:00Fundamental limit to Spin Exchange Optical Pumping (SEOP)In a detailed calculation, we have shown that anisotropic hyperfine interaction between the atomic electron and the rare-gas nucleus spins sets a fundamental limit to the maximum attainable polarization transfer of electron spin to nuclear spin. (submitted to PRL)<br /><br />Tscherbul, Zhang, Sadeghpour and Dalgarno ( <a href="http://arxiv.org/abs/1012.0593" target="_blank">http://arxiv.org/abs/1012.<wbr>0593</a>).HRShttp://www.blogger.com/profile/00811609813518037383noreply@blogger.com0tag:blogger.com,1999:blog-60030803362389929.post-69174737406247697152010-12-28T09:38:00.001-05:002010-12-28T09:42:18.428-05:00ITAMP intitial blogTo initiate blogging on ITAMPITAMPblogerhttp://www.blogger.com/profile/12844502676999940232noreply@blogger.com0