talk by Oriol Romero-Isart

Oriol 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.