Time dilation affecting quantum superpositions

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].

The gravitational field causes time dilation: clocks closer to 

Earth run slower than clocks further away. For a quantum 

superposition of a single clock at two heights, the clock 

states and its position become entangled.

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, two 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 single 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.

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. 

A complex molecule in superposition in a gravitational 

field. Because of time dilation, the frequencies of the 

individual atoms depend on the height of the molecule. 

This causes decoherence of quantum superpositions 

of the center-of-mass of the molecule.

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 any 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].

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!

[1] R. Colella, A. W. Overhauser, S. A. Werner. “Observation of Gravitationally Induced Quantum Interference”, Phys. Rev. Lett. 34, 1472 (1975).

[2] M. Zych, F. Costa, I. Pikovski, Č. Brukner. “Quantum interferometric visibility as a witness of general relativistic proper time”, Nature Communications 2,505 (2011).

[3] I. Pikovski, M. Zych, F. Costa, Č. Brukner, “Universal decoherence due to gravitational time dilation”, Nature Physics 11,668-672 (2015).

[4] I. Pikovski, M. Zych, F. Costa, Č. Brukner, “Time Dilation in Quantum Systems and Decoherence: Questions and Answers”, arXiv:1508.03296 [quant-ph] (2015).

Binding together repelling atoms

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* report their results in the journal Nature Communications [1].

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.

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.

*presently at the Institute for Theoretical Physics at Leibniz Universität Hannover, Germany

[1] M. Lemeshko, H. Weimer. Dissipative binding of atoms by non-conservative forces. Nature Communications 4, 2230 (2013).

[The attached figure shows the probability distribution of two atoms forming the novel bond. Red color indicating high probability occurs at lines of fixed distance between the atoms.]

ITAMP 2013 DAMOP presentations (Quebec City Canada)

ITAMP 2013 DAMOP presentations (Quebec City Canada)

James Babb
4:00 PM–4:00 PM, Tuesday, June 4, 2013
Room: 400A
Abstract: D1.00131 : Rydberg helium and the helium dimer: Relativistic and retardation effects
http://meeting.aps.org/Meeting/DAMOP13/Event/194145

Johannes Feist

4:00 PM–4:00 PM, Tuesday, June 4, 2013
Room: 400A

Abstract: D1.00057 Deterministic Coupling of a Single Atom to a Nanoscale Optical Cavity

http://meeting.aps.org/Meeting/DAMOP13/Event/194071

Doerte Blume
4:00 PM–4:00 PM, Tuesday, June 4, 2013
Room: 400A
Abstract: D1.00061 : Thermodynamics of systems of aligned dipoles
http://meeting.aps.org/Meeting/DAMOP13/Event/194075

Doerte Blume
X.Y. Yin

4:00 PM–4:00 PM, Wednesday, June 5, 2013
Room: 400A

Abstract: K1.00046 : Energy spectra of small two-component Fermi gases in a cubic box with periodic boundary conditions

http://meeting.aps.org/Meeting/DAMOP13/Event/194392

Doerte Blume
Seyed Ebrahim Gharashi
3:00 PM–3:12 PM, Thursday, June 6, 2013
Room: 200A 
Abstract: P1.00003 : Correlations of the metastable branch of harmonically-trapped one-dimensional two-component Fermi gases
http://meeting.aps.org/Meeting/DAMOP13/Event/194605

Doerte Blume

Yangqian Yan 

4:00 PM–4:00 PM, Thursday, June 6, 2013

Room: 400A

Abstract:Q1.00048 : Finite-temperature properties of small trapped two-component Fermi gases: Tan contact and statistics

http://meeting.aps.org/Meeting/DAMOP13/Event/194718

Doerte Blume
Janine Shertzer

10:30 AM–12:30 PM, Friday, June 7, 2013
Room: 303
Abstract: U7.00006 : Scattering properties of three ultracold atoms in a cylindrical waveguide geometry

11:30 AM–11:42 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194915

Doerte Blume

Arghavan Safavi 

Seth Rittenhouse 

Hossein Sadeghpour

10:30 AM–12:30 PM, Friday, June 7, 2013
Room: 303
Abstract: U7.00007 : Non-universal bound states of two identical heavy fermions and one light particle

http://meeting.aps.org/Meeting/DAMOP13/Event/194916

Tony Lee
Sarang Gopalakrishnan
Mikhail Lukin 

 8:00 AM–9:48 AM, Wednesday, June 5, 2013
Room: 204
Abstract: Dissipative phase transitions in anisotropic spin models

9:12 AM–9:24 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194201

Tony Lee 

Anzi Hu

Charles Clark

10:30 AM–12:30 PM, Wednesday, June 5, 2013
Room: 202
Abstract: H3.00007 : Long-range spatial correlations in a driven-dissipative system of Rydberg atoms

11:42 AM–11:54 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194255

Mikhail Lemeshko
Hendrik Weimer 

2:00 PM–4:00 PM, Wednesday, June 5, 2013
Room: 202
Abstract: J3.00006 : Dissipative binding of atoms by non-conservative forces

3:00 PM–3:12 PM

http://meeting.aps.org/Meeting/DAMOP13/Event/194314

Mikhail Lemeshko

Satyan Bhongale

Ludwig Mathey 

Erhai Zhao 

Susanne Yelin 

10:30 AM–12:30 PM, Thursday, June 6, 2013
Room: 200B
Abstract:  N2.00008 : Quantum phases of quadrupolar Fermi gases in optical lattices

11:54 AM–12:06 PM

http://meeting.aps.org/Meeting/DAMOP13/Event/194553

Charles Mathy
Michael Knap
Eugene Demler

 10:30 AM–12:06 PM, Thursday, June 6, 2013
Room: 202
Abstract: Quantum flutter versus Bloch oscillations in one-dimensional quantum liquids out of equilibrium

10:42 AM–10:54 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194558

Swati Singh

Steven Steinke

Pierre Meystre

Keith Schwab 

Mukund Vengalattore 

10:30 AM–12:06 PM, Tuesday, June 4, 2013
Room: 202
Abstract: B3.00007 : Measurement backaction on a spinor condensate from off-resonant light

11:42 AM–11:54 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/193908

Swati Singh

Adi Pick

Mikhail D. Lukin

Susanne F. Yelin 

 8:00 AM–9:24 AM, Friday, June 7, 2013
Room: 302
Abstract:T6.00003 : Cooling of Nuclear Spins in Diamond via Dark State Spectroscopy

8:24 AM–8:36 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194846

Arghavan Safavi-Naini

Barbara Capogrosso-Sansone

Anatoly Kuklov 

2:00 PM–4:00 PM, Wednesday, June 5, 2013
Room: 200B
Abstract: J2.00001 : Strongly interacting quantum phases of polarized dipolar bosons in multi-layered optical lattice

2:00 PM–2:12 PM

http://meeting.aps.org/Meeting/DAMOP13/Event/194298

Arghavan Safavi

Seth Rittenhouse

Dorte Blume 

Hossein Sadeghpour 

10:30 AM–12:30 PM, Friday, June 7, 2013
Room: 303
Abstract: U7.00007 : Non-universal bound states of two identical heavy fermions and one light particle

11:42 AM–11:54 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194916

Janine Shertzer

Aaron Temkin

  4:00 PM–4:00 PM, Wednesday, June 5, 2013
Room: 400A
Abstract: K1.00131 : Electron scattering from excited states of H: derivation of the ionization threshold law

http://meeting.aps.org/Meeting/DAMOP13/Event/194477

Janine Shertzer 

Doerte Blume

 10:30 AM–12:30 PM, Friday, June 7, 2013
Room: 303
Abstract: U7.00006 : Scattering properties of three ultracold atoms in a cylindrical waveguide geometry

11:30 AM–11:42 AM

http://meeting.aps.org/Meeting/DAMOP13/Event/194915

Quadrupolar atoms and molecules as a new platform to study many-body physics

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].

In the recent article in Physical Review Letters [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.

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.

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.

[1] T. Lahaye et al., Rep. Prog. Phys. 72, 126401 (2009); M. Baranov, Phys. Rep. 464, 71 (2008)

[2] S. G. Bhongale, L. Mathey, E. Zhao, S. F. Yelin, M. Lemeshko, Phys. Rev. Lett. 110, 155301 (2013)

Collective Qubits Compute Faster

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 report our results in the journal Physical Review Letters.

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.

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 50 collective qubits are sufficient for immediate applications in the simulation of strongly correlated quantum systems.

Reference: Hendrik Weimer, Norman Y. Yao, Mikhail D. Lukin. Collectively enhanced interactions in solid-state spin qubits, Physical Review Letters 110, 067601 (2013).

ICAP 2012

This year the International Conference on Atomic Physics was hosted by École Polytechnique in Palaiseau near Paris, France.

Misha Lemeshko presented a poster "Dynamically engineering strongly-interacting phases in ultracold dipolar gases" [pdf], describing his recent work in collaboration with Hendrik Weimer and Roman Krems.

Building a crystal out of quantum bricks

Preparation 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 recent publication in Physical Review Letters, 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.

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.

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.





Reference: Mikhail Lemeshko, Roman V. Krems, and Hendrik Weimer,
"Nonadiabatic Preparation of Spin Crystals with Ultracold Polar Molecules",
Phys. Rev. Lett. 109, 035301 (2012).


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.

ITAMP 2012 DAMOP presentations (Orange County, California)

ITAMP 2012 DAMOP presentations (Orange County, California)

James Babb
10:30 AM-12:30 PM, Thursday, June 7, 2012
Room: Terrace
Abstract: N7.00006 : Long-range interactions between Mg atoms
11:30 AM–11:42 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171916

Johannes Feist
8:00 AM–10:00 AM, Wednesday, June 6, 2012
Room: Garden 1-2
Abstract: G4.00005 : Nanoplasmonic light field synthesis for isolated attosecond pulse generation

9:24 AM–9:36 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171477

Johannes Feist
4:00 PM–4:00 PM, Wednesday, June 6, 2012
Room: Royal Ballroom
Abstract: K1.00021 : Attosecond streaking of correlated two-electron transitions
http://meetings.aps.org/Meeting/DAMOP12/Event/171658

Adam Kirrander
4:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Royal Ballroom
Abstract: D1.00037 : Quantum dynamics in strong fields with Fermion Coupled Coherent States
 http://meetings.aps.org/Meeting/DAMOP12/Event/171332

Adam Kirrander
8:00 AM–10:00 AM, Thursday, June 7, 2012
Room: Garden 4
Abstract: M6.00007 : Theoretical Dynamics of Heavy Rydberg States in Rb$_2$
9:12 AM–9:24 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171850

Adam Kirrander
4:00 PM–4:00 PM, Thursday, June 7, 2012
Room: Royal Ballroom
Abstract: Q1.00009 : X-ray diffraction assisted spectroscopy of Rydberg states
http://meetings.aps.org/Meeting/DAMOP12/Event/171991



Mikhail Lemeshko
2:00 PM–4:00 PM, Wednesday, June 6, 2012
Room: Garden 3
Abstract: J5.00004 : Molecular interactions in and with fields: thermal collisions, ultracold gases, supersymmetry
3:30 PM–4:00 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171614

 Guin-Dar Lin
2:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Grand Ballroom GF
Abstract: C2.00010 : Cooling of particle ensembles with cooperative effects
3:48 PM–4:00 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171260

 
Jerome Loreau
8:00 AM–10:00 AM, Friday, June 8, 2012
Room: Garden 1-2
Abstract: T4.00007 : Non-reactive collisions of sodium and silver atoms with nitrogen molecules

9:12 AM–9:24 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/172175
 
Charles Mathy
2:00 PM–4:00 PM, Thursday, June 7, 2012
Room: Garden 1-2
Abstract: P4.00005 : Quantum flutter of supersonic particles in one-dimensional quantum liquids

2:48 PM–3:00 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171944

Roberto Onofrio 
10:30 AM–12:30 PM, Wednesday, June 6, 2012
Room: Grand Ballroom E
Abstract: H3.00004 : Angular momentum changing transitions in proton-Rydberg hydrogen atom collisions

11:06 AM–11:18 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171529

Seth Rittenhouse
4:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Royal Ballroom
Abstract: D1.00122 : Theoretical and Experimental evidence for the observation of trilobite states in Cs
http://meetings.aps.org/Meeting/DAMOP12/Event/171417

Seth Rittenhouse
 8:00 AM–10:00 AM, Thursday, June 7, 2012
Room: Garden 4
Abstract: M6.00005 : Homonuclear cesium Rydberg molecules
8:48 AM–9:00 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171848

Seth Rittenhouse
 10:30 AM–12:30 PM, Thursday, June 7, 2012
Room: Grand Ballroom GF
Abstract: N2.00003 : First order SF-MI transition in the Bose-Hubbard model with tunable three-body onsite interaction
10:54 AM–11:06 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171859

H.R. Sadeghpour
0:30 AM–12:30 PM, Wednesday, June 6, 2012
Room: Grand Ballroom E
Abstract: H3.00004 : Angular momentum changing transitions in proton-Rydberg hydrogen atom collisions
11:06 AM–11:18 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171529

H.R. Sadeghpour
 8:00 AM–10:00 AM, Thursday, June 7, 2012
Room: Garden 4
Abstract: M6.00007 : Theoretical Dynamics of Heavy Rydberg States in Rb$_2$
9:12 AM–9:24 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171850


H.R. Sadeghpour
 2:00 PM–3:48 PM, Thursday, June 7, 2012
Room: Garden 4
Abstract: P6.00009 : An ab-initio model of anomalous heating in planar ion traps
3:36 PM–3:48 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171970

H.R. Sadeghpour
 8:00 AM–10:00 AM, Thursday, June 7, 2012
Room: Garden 4
Abstract: M6.00005 : Homonuclear cesium Rydberg molecules
8:48 AM–9:00 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171848

H.R. Sadeghpour
 2:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Terrace
Abstract: C7.00004 : Rydberg atom mediated polar molecule interactions
3:30 PM–4:00 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171294

H.R. Sadeghpour
 4:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Royal Ballroom
Abstract: D1.00122 : Theoretical and Experimental evidence for the observation of trilobite states in Cs
http://meetings.aps.org/Meeting/DAMOP12/Event/171417


Arghavan Safavi-Naini
 10:30 AM–12:30 PM, Thursday, June 7, 2012
Room: Grand Ballroom GF
Abstract: N2.00003 : First order SF-MI transition in the Bose-Hubbard model with tunable three-body onsite interaction
10:54 AM–11:06 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/171859

Arghavan Safavi-Naini
 2:00 PM–3:48 PM, Thursday, June 7, 2012
Room: Garden 4
Abstract: P6.00009 : An ab-initio model of anomalous heating in planar ion traps
3:36 PM–3:48 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171970


Hendrik Weimer
8:00 AM–10:00 AM, Friday, June 8, 2012
Room: Grand Ballroom GF
Abstract: T2.00006 : Supersymmetry in Rydberg-dressed lattice fermions
9:00 AM–9:12 AM
http://meetings.aps.org/Meeting/DAMOP12/Event/172156

 Susanne Yelin
2:00 PM–4:00 PM, Tuesday, June 5, 2012
Room: Grand Ballroom GF
Abstract: C2.00010 : Cooling of particle ensembles with cooperative effects
3:48 PM–4:00 PM
http://meetings.aps.org/Meeting/DAMOP12/Event/171260

Susanne Yelin
 4:00 PM–4:00 PM, Wednesday, June 6, 2012
Room: Royal Ballroom
Abstract: K1.00066 : Theory of laser cooling of nuclear spins based on coherent population trapping
http://meetings.aps.org/Meeting/DAMOP12/Event/171703


 



  

ITAMP Talks at the DPG Spring Meeting (Stuttgart, Germany)

Demler, Eugene
SYRA 2.4 Supersymmetry in Rydberg-dressed lattice fermions

Laumann, Chris
Q 19.1 Long-range quantum gates for nitrogen-vacancy defect centers in diamond

Lukin, Mikhail
Q 7.7 Robustness of Topological Operations with Ultracold Atoms
Q 19.1 Long-range quantum gates for nitrogen-vacancy defect centers in diamond
SYRA 1.4 Electromagnetically Induced Transparency in Strongly Interacting Rydberg Gases
SYRA 2.4 Supersymmetry in Rydberg-dressed lattice fermions

Rittenhouse, Seth
SYRA 2.3 Electric field impact on ultra-long-range triatomic polar Rydberg molecules

Sadeghpour, Hossein
Q 62.1 A homonuclear polar molecule
SYRA 2.3 Electric field impact on ultra-long-range triatomic polar Rydberg molecules

Weimer, Hendrik
Q 19.1 Long-range quantum gates for nitrogen-vacancy defect centers in diamond
SYRA 2.4 Supersymmetry in Rydberg-dressed lattice fermions

ITAMP Talks APS March March 2012

	Aspuru-Guzik, Alan V28.00004 Nonradiative lifetimes in intermediate band materials -- absence of lifetime recovery L35.00010 The derivative discontinuity in density functional theory from an electrostatic description of the exchange and correlation potential V48.00012 Accessing exciton transport in light-harvesting structures with plasmonic nanotip V34.00010 How much information do ultrafast spectra contain? The case for ultrafast quantum process tomography T30.00006 Algorithmic Quantum Cooling J34.00003 2-Dimensional Fluorescence Spectroscopy: Determining the Temperature-Dependent Conformations of Porphyrin Dimers and Nucleic Acids L36.00002 Study of excitonic energy transport in thin-film J-aggregates W41.00002 Absence of quantum oscillations in electronic excitation transfer in the Fenna-Matthews-Olson complex J30.00005 Quantum simulator of an open quantum system using superconducting qubits: exciton transport in photosynthetic complexes J34.00002 Conformation of self-assembled porphyrin dimers in liposome vesicles by phase-modulation 2D fluorescence spectroscopy X17.00004 Plasmonic nanotips for spectroscopy with nanometer-scale resolution W35.00009 Applying state-of-the-art signal processing to time-dependent density functional theory B7.00002 The Harvard Clean Energy Project: High-throughput screening of organic photovoltaic materials using cheminformatics, machine learning, and pattern recognition B7.00001 The Harvard Clean Energy Project: High-throughput screening of organic photovoltaic materials using first-principles electronic structure theory V35.00004 Time-dependent density functional theory for open quantum systems Cappellaro, Paola K1.00260 Composite-pulse magnetometry in the solid-state K1.00308 Perfect mixed state quantum transport in correlated spin networks Demler, Eugene J4.00001 Non Equilibrium Quantum Criticality: an intuitive approach Z4.00003 Collective mode of an impurity and a Tonks-Girardeau gas D4.00010 Clustering of cold polar molecules in arrays of one-dimensional tubes V4.00001 Doublon production rate by optical lattice modulation for strongly correlated Fermionic atoms D4.00007 Tunable Superfluidity with Ultracold Polar Molecules on quasi-1D Optical Lattices J4.00003 Stability of Counterflow Superfluidity A32.00015 Photo-induced quantum Hall insulators without Landau levels D4.00006 Quantum Magnetism with Polar Molecules: Tunable Generalized $t$-$J$ Model A8.00011 Emergence and lifting of frustration for dipolar molecules Feist, Johannes  D10.00005 Accessing correlated electron motion on the attosecond timescale V48.00012 Accessing exciton transport in light-harvesting structures with plasmonic nanotip X17.00004 Plasmonic nanotips for spectroscopy with nanometer-scale resolution V4.00013 A Quantum Plasmonic Circuit for Cold Atoms A4.00003 A nanoscale quantum interface for single atoms Laumann, Chris  K1.00283 Topologically Protected Quantum State Transfer in a Chiral Spin Liquid D29.00009 Long-range quantum gates using dipolar crystals  T24.00005 Microscopic Disorder-Based model for non-Abelian Quasi-Particles in $\nu=5/2$ FQH states

Lemeshko, Mikhail
K1.00334 Sensitive imaging of electromagnetic fields with cold polar molecules

Lukin, Mikhail 
D4.00007 Tunable Superfluidity with Ultracold Polar Molecules on quasi-1D Optical Lattices
A30.00010 Towards Probing Living Cell Function with NV Centers in Nanodiamonds
D4.00003 Altering Photon Statistics using Strong Rydberg Interactions
D4.00002 Towards single-photon optical nonlinearities using cold Rydberg atoms
D4.00006 Quantum Magnetism with Polar Molecules: Tunable Generalized $t$-$J$ Model
A30.00006 Decoherence imaging of spin ensembles by a scannable single nitrogen-vacancy center in diamond
V48.00012 Accessing exciton transport in light-harvesting structures with plasmonic nanotip
A4.00003 A nanoscale quantum interface for single atoms
A4.00001 A Light-Matter Interface with NV Centers
V4.00013 A Quantum Plasmonic Circuit for Cold Atoms
A4.00002 Probing the motion of a mechanical resonator via coherent coupling to a single spin qubit
D29.00007 Room temperature solid-state quantum bit with second-long memory
D29.00005 Optimizing the resolution and the sensitivity of a scanning NV magnetometer
D29.00003 Quantum interference of single photons from two remote Nitrogen-Vacancy centers in diamond
D29.00010 Magnetic imaging of a single electron spin using a scanning NV magnetometer under ambient conditions
X17.00004 Plasmonic nanotips for spectroscopy with nanometer-scale resolution
W41.00003 Progress Towards Room-Temperature Electron Spin Detection in Biological Systems
D29.00013 Spectroscopy of composite solid-state spin environments for improved metrology with spin ensembles
B4.00005 Coupling a single spin in diamond to the quantum motion of a mechanical cantilever
L10.00003 Quantum optics with solid-state atom-like systems
A30.00005 Cooling Nuclear Spins in Diamond via Dark State Spectroscopy
A30.00003 Quantum Optics with Spins and Photons in Diamond

Mathy, Charles
Z4.00003 Collective mode of an impurity and a Tonks-Girardeau gas

Onofrio, Roberto
B1.00002 Four techniques to achieve deeper Fermi degeneracy in Fermi-Bose mixtures
B1.00003 Optimized sympathetic cooling of atomic mixtures via fast adiabatic strategies

Rittenhouse, Seth
D4.00011 A dielectric superfluid of polar molecules

Safavi-Naini
A. A4.00010 An ab-initio microscopic theory of anomalous heating in planar ion traps
D4.00013 Paired Phases of Dipoles in a Bilayer System

Sadeghpour, H.R. 
A4.00010 An ab-initio microscopic theory of anomalous heating in planar ion traps
D4.00013 Paired Phases of Dipoles in a Bilayer System

Weimer, Hendrik
K1.00283 Topologically Protected Quantum State Transfer in a Chiral Spin Liquid

Yelin, Susanne
A30.00005 Cooling Nuclear Spins in Diamond via Dark State Spectroscopy

ITAMP/B2 Winter Graduate School on AMO Physics, Jan 8-20, 2012

The 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.

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.

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.

A homonuclear molecule with a permanent dipole moment

Traditional 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 new article 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.

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.

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.

(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 (figure from Ref. [1]).


References:
[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, Science 334, 1110 (2011).

[2] H. R. Sadeghpour, A. S. Dickinson and C. H. Greene, Phys. Rev Lett. 85, 2458 (2000).

[3] V. Bendkowsky et al., Nature 458, 1005 (2009).

Watching correlated electron motion with attosecond pulses

In a recent paper published in Physical Review Letters, 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^-18 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.

In our proposed setup, the first (pump) pulse excites a coherent wave packet of doubly excited states. 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. 

In the paper, we show that by measuring only one 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 both electrons: the distance between them at the moment of ionization.

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 one photon has to lead to a two-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 reference pathway that 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.

Reference: J. Feist, S. Nagele, C. Ticknor, B. I. Schneider, L. A. Collins, and J. Burgdörfer, Phys. Rev. Lett. 107, 093005 (2011)

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.

Viewpoint

Atomic and Molecular Physics

Physics 4, 66 (2011)DOI: 10.1103/Physics.4.66

All that is gold does not glitter

Nikos Daniilidis and Hartmut HäffnerDepartment of Physics, University of California, Berkeley, CA 94720-7300, USA

Published August 22, 2011

A microscopic model offers new insight into a pernicious source of electric field noise in ion traps.

More here ....

A Viewpoint on:

Microscopic model of electric-field-noise heating in ion traps

A. Safavi-Naini, P. Rabl, P. F. Weck, and H. R. Sadeghpour

Phys. Rev. A 84, 023412 (2011) – Published August 22, 2011

Download PDF (free)

Artificial Atoms Can Do More Than Atoms

In 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.

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.

Reference: J. Honer, R. Löw, H. Weimer, T. Pfau, H. P. Büchler, Phys. Rev. Lett. 107, 093601 (2011).
See also: Synopsis in Physics

ITAMP 2011 DAMOP presentations (in Atlanta, GA)

 Babb

10:30 AM–12:30 PM, Tuesday, June 14, 2011
Room: A705
Chair: Ed Eyler, University of Connecticut

Abstract: B5.00007 : Partial derivatives of eigenvalues without finite differences

11:42 AM–11:54 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147020

Babb

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC
Abstract: E1.00059 : Long-Range Three-Body Dispersion Interactions

http://meetings.aps.org/Meeting/DAMOP11/Event/147137

Capogrosso

8:00 AM–10:00 AM, Wednesday, June 15, 2011
Room: A704

Chair: Nathan Gemelke, Pennsylvania State University

Abstract: H4.00003 : Pair-Supersolidity of Dipoles in a Bilayer System

8:42 AM–8:54 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147294

Capogrosso

10:30 AM–12:30 PM, Thursday, June 16, 2011
Room: A602

Chair: Markus Greiner, Harvard University

Abstract: N2.00005 : Quantum magnetic phases in harmonically trapped two-component bosons

11:18 AM–11:30 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147674

Demler

10:30 AM–12:30 PM, Tuesday, June 14, 2011
Room: A704
Chair: Benjamin Lev, University of Illinois at Urbana-Champaign

Abstract: B4.00005 : Quantum Magnetism with Polar Alkali Dimers

11:54 AM–12:06 PMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147010

 Demler
4:00 PM–4:00 PM, Tuesday, June 14, 2011

Room: Atrium Ballroom BC
Abstract: E1.00012 : Emulating Quantum Magnetism and t--J Models in Systems of Ultracold Polar Molecules

http://meetings.aps.org/Meeting/DAMOP11/Event/147090

Demler
0:30 AM–12:30 PM, Thursday, June 16, 2011
Room: A705
Chair: Josh Zirbel, University of Illinois at Urbana-Champaign
Abstract: N5.00003 : Non-Equilibrium Dynamics of 1d Bose Gases Studied via Noise Distributions
10:54 AM–11:06 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147699

Demler

8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A705
Chair: Alex Kuzmich, Georgia Institute of Technology

Abstract: T5.00006 : Robust optical delay lines via topological protection

9:00 AM–9:12 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147977

Demler

 8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A706
Chair: Georg Raithel, University of Michigan

Abstract: T6.00007 : Majorana Fermions in Cold Atom Quantum Wires

9:48 AM–10:00 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147989

Feist

2:00 PM–4:00 PM, Wednesday, June 15, 2011
Room: A705

Chair: Arvinder Sandhu, University of ArizonaAbstract: K5.00003 : Attosecond pump-probe of doubly excited states in helium

2:24 PM–2:36 PM http://meetings.aps.org/Meeting/DAMOP11/Event/147406

Feist

2:00 PM–4:00 PM, Thursday, June 16, 2011
Room: A602

Chair: David Reis, SLAC and Standford University

Abstract: P2.00003 : Time-resolved photoemission by attosecond streaking: extraction of time information

2:42 PM–2:54 PM
http://meetings.aps.org/Meeting/DAMOP11/Event/147726

Gacesa

8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A601

Chair: Steven Manson, Georgia State University

Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$

9:36 AM–9:48 AM

 http://meetings.aps.org/Meeting/DAMOP11/Event/147948

Kharchenko

8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A601

Chair: Steven Manson, Georgia State University

Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$

9:36 AM–9:48 AM
 http://meetings.aps.org/Meeting/DAMOP11/Event/147948

Kuznetsova

8:00 AM–10:00 AM, Thursday, June 16, 2011
Room: A705
Chair: Emily Edwards, JQI and University of Maryland

Abstract: M5.00007 : Cluster state generation using long-range interactions

9:12 AM–9:24 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147652

Kuznetsova

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC
Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates

http://meetings.aps.org/Meeting/DAMOP11/Event/147915

 Loreau

10:30 AM–12:30 PM, Wednesday, June 15, 2011
Room: A703

Chair: Francis Robicheaux, Auburn University

Abstract: J3.00009 : Isotope effect on charge transfer in collisions of H with He$^+$ and He$^{2+}$

12:06 PM–12:18 PM
http://meetings.aps.org/Meeting/DAMOP11/Event/147340

 Lukin

10:30 AM–12:30 PM, Tuesday, June 14, 2011
Room: A703
Chair: Gretchen Campbell, JQI and NIST
Abstract: B3.00009 : Sub-wavelength optical trapping and manipulation using far-field optics
12:06 PM–12:18 PM http://meetings.aps.org/Meeting/DAMOP11/Event/147003

 Lukin

10:30 AM–12:30 PM, Tuesday, June 14, 2011
Room: A704

Chair: Benjamin Lev, University of Illinois at Urbana-Champaign

Abstract: B4.00005 : Quantum Magnetism with Polar Alkali Dimers

11:54 AM–12:06 PM http://meetings.aps.org/Meeting/DAMOP11/Event/147010

Lukin

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00012 : Emulating Quantum Magnetism and t--J Models in Systems of Ultracold Polar Molecules

 http://meetings.aps.org/Meeting/DAMOP11/Event/147090

Lukin

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00096 : Towards room temperature magnetic sensing of a single electron spin in biological systems

http://meetings.aps.org/Meeting/DAMOP11/Event/147174

 Lukin

 4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00042 : A Nanoplasmonic Lattice for Quantum Simulation with Cold Atoms

 http://meetings.aps.org/Meeting/DAMOP11/Event/147120

 Lukin   

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00097 : All optical real-time measurement and preparation of nuclear spin states around an individual NV center in diamond

 http://meetings.aps.org/Meeting/DAMOP11/Event/147175

  Lukin  

 4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00098 : Measurement-Based Nuclear Spin Cooling in NV Centers

 http://meetings.aps.org/Meeting/DAMOP11/Event/147176

 Lukin 

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00099 : Sensing thermal motion of a mechanical resonator using a single spin qubit in diamond

http://meetings.aps.org/Meeting/DAMOP11/Event/147177


Lukin  

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00100 : Long-lived solid-state room-temperature quantum memory

http://meetings.aps.org/Meeting/DAMOP11/Event/147178



Lukin  

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00148 : Topologically Protected Quantum State Transfer

http://meetings.aps.org/Meeting/DAMOP11/Event/147226

 Lukin 
4 :00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC
Abstract: E1.00152 : Coupling of NV centers to microscopic cavities
http://meetings.aps.org/Meeting/DAMOP11/Event/147230

 Lukin

8:00 AM–10:00 AM, Wednesday, June 15, 2011
Room: A602
Chair: Tatjana Curcic, Air Force Office of Scientific Research

Abstract: H2.00001 : Optics with Nitrogen Vacancy Centers in Diamond

8:00 AM–8:30 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147273

 Lukin

8:00 AM–10:00 AM, Wednesday, June 15, 2011
Room: A602
Chair: Tatjana Curcic, Air Force Office of Scientific Research

Abstract: H2.00002 : Magnetic field imaging with NV ensembles

8:30 AM–8:42 AM http://meetings.aps.org/Meeting/DAMOP11/Event/147274

 Lukin

4:00 PM–4:00 PM, Wednesday, June 15, 2011
Room: Atrium Ballroom BC

Abstract: L1.00108 : Hybrid Devices for Cavity QED in Solid State Systems

 http://meetings.aps.org/Meeting/DAMOP11/Event/147538

 Lukin

8:00 AM–10:00 AM, Thursday, June 16, 2011
Room: A705
Chair: Emily Edwards, JQI and University of Maryland

Abstract: M5.00004 : Long-range quantum gates using external symmetry breaking

8:36 AM–8:48 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147649

 Lukin
4:00 PM–4:00 PM, Thursday, June 16, 2011

Room: Atrium Ballroom BC

Abstract: Q1.00121 : Nanowire Plasmon Resonators

http://meetings.aps.org/Meeting/DAMOP11/Event/147888

 Lukin

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC
Abstract: Q1.00137 : A nanoscale quantum interface for single atoms

http://meetings.aps.org/Meeting/DAMOP11/Event/147905

 Lukin

8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A703
Chair: Steve Rolston, JQI and University of Maryland

Abstract: T3.00010 : Dark-State Polaritons with Rydberg Interactions

9:48 AM–10:00 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147965


Lukin

8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A705
Chair: Alex Kuzmich, Georgia Institute of Technology

Abstract: T5.00006 : Robust optical delay lines via topological protection

9:00 AM–9:12 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147977

 Lukin
8:00 AM–10:00 AM, Friday, June 17, 2011

Room: A706
Chair: Georg Raithel, University of Michigan

Abstract: T6.00007 : Majorana Fermions in Cold Atom Quantum Wires

9:48 AM–10:00 AMhttp://meetings.aps.org/Meeting/DAMOP11/Event/147989

Mathy

8:00 AM–10:00 AM, Wednesday, June 15, 2011
Room: A601

Chair: Ken O'Hara, Pennsylvania State University

Abstract: H1.00003 : Universal features of strongly polarized mass imbalanced fermi gases

8:24 AM–8:36 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147264

Rittenhouse

4:00 PM–4:00 PM, Wednesday, June 15, 2011
Room: Atrium Ballroom BC
Abstract: L1.00004 : A Dielectric Superfluid of Polar Molecules

http://meetings.aps.org/Meeting/DAMOP11/Event/147434
  
Rittenhouse

2:00 PM–4:00 PM, Thursday, June 16, 2011
Room: A706

Chair: Doerte Blume, Washington State UniversityAbstract: P6.00003 : Probing universal few-body dynamics

3:00 PM–3:30 PM
http://meetings.aps.org/Meeting/DAMOP11/Event/147764

 Rittenhouse

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC
Abstract: Q1.00008 : Ultralong-range polyatomic Rydberg molecules formed by a polar perturber

 http://meetings.aps.org/Meeting/DAMOP11/Event/147774

 Rittenhouse

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC

Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates

http://meetings.aps.org/Meeting/DAMOP11/Event/147915

 

Sadeghpour

4:00 PM–4:00 PM, Wednesday, June 15, 2011

Room: Atrium Ballroom BC
Abstract: L1.00151 : Self-broadening of helium $^1D$ and $^3D$ lines

http://meetings.aps.org/Meeting/DAMOP11/Event/147582

 

Sadeghpour

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC
Abstract: Q1.00008 : Ultralong-range polyatomic Rydberg molecules formed by a polar perturber

 http://meetings.aps.org/Meeting/DAMOP11/Event/147774

 

Sadeghpour

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC
Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates

http://meetings.aps.org/Meeting/DAMOP11/Event/147915

 

Sadeghpour

10:30 AM–12:30 PM, Wednesday, June 15, 2011
Room: A601
Chair: Jake Taylor, JQI and NISTAbstract: J1.00003 : An ab-initio model of anomalous heating in planar ion traps

10:54 AM–11:06 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147318

Weimer

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC
Abstract: E1.00148 : Topologically Protected Quantum State Transfer

http://meetings.aps.org/Meeting/DAMOP11/Event/147226

Weimer

8:00 AM–10:00 AM, Thursday, June 16, 2011
Room: A705
Chair: Emily Edwards, JQI and University of Maryland

Abstract: M5.00004 : Long-range quantum gates using external symmetry breaking

8:36 AM–8:48 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147649

Yelin

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00097 : All optical real-time measurement and preparation of nuclear spin states around an individual NV center in diamond

http://meetings.aps.org/Meeting/DAMOP11/Event/147175

Yelin 

4:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: Atrium Ballroom BC

Abstract: E1.00098 : Measurement-Based Nuclear Spin Cooling in NV Centers

http://meetings.aps.org/Meeting/DAMOP11/Event/147176

Yelin

8:00 AM–10:00 AM, Wednesday, June 15, 2011
Room: A703
Chair: Ivan Deutsch, University of New Mexico

Abstract: H3.00006 : Superradiance in spin-J atoms: Effects of multiple atomic levels

9:00 AM–9:12 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147286

Yelin

8:00 AM–10:00 AM, Thursday, June 16, 2011
Room: A705
Chair: Emily Edwards, JQI and University of Maryland

Abstract: M5.00007 : Cluster state generation using long-range interactions

9:12 AM–9:24 AM
http://meetings.aps.org/Meeting/DAMOP11/Event/147652

Yelin

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC

Abstract: Q1.00136 : On nearest-neighbor interactions of cold polar molecules in two-color arrays

 http://meetings.aps.org/Meeting/DAMOP11/Event/147904

Yelin

4:00 PM–4:00 PM, Thursday, June 16, 2011
Room: Atrium Ballroom BC

Abstract: Q1.00147 : Rydberg molecules mediated interaction between polar molecules: a new tool to realize two-qubit gates

 http://meetings.aps.org/Meeting/DAMOP11/Event/147915

Zhang

4:00 PM–4:00 PM, Wednesday, June 15, 2011
Room: Atrium Ballroom BC
Abstract: L1.00151 : Self-broadening of helium $^1D$ and $^3D$ lines

http://meetings.aps.org/Meeting/DAMOP11/Event/147582

Zhang 

 8:00 AM–10:00 AM, Friday, June 17, 2011
Room: A601

Chair: Steven Manson, Georgia State University

Abstract: T1.00006 : Energy transfer in collisions of atmospheric O and H$_2$

9:36 AM–9:48 AM
 http://meetings.aps.org/Meeting/DAMOP11/Event/147948