6533b828fe1ef96bd12883b2
RESEARCH PRODUCT
Expansion of a quantum gas released from an optical lattice
Simon FöllingBarbara Capogrosso-sansoneArtur WideraLode PolletImmanuel BlochStefan TrotzkyJeff D. ThompsonU. SchnorrbergerFabrice GerbierNikolai Prokof'evNikolai Prokof'evNikolai Prokof'evBoris SvistunovBoris SvistunovMatthias Troyersubject
PhysicsCondensed Matter::Quantum GasesOptical latticeCondensed matter physicsQuantum Monte CarloQuantum dynamicsQuantum annealingGeneral Physics and AstronomyQuantum simulatorFOS: Physical sciences01 natural sciencesMolecular physics010305 fluids & plasmas3. Good healthCondensed Matter - Other Condensed MatterParticle in a one-dimensional lattice[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]0103 physical sciencesPhysics::Atomic Physics010306 general physicsQuantum dissipationLattice model (physics)Other Condensed Matter (cond-mat.other)description
We analyze the interference pattern produced by ultracold atoms released from an optical lattice. Such interference patterns are commonly interpreted as the momentum distributions of the trapped quantum gas. We show that for finite time-of-flights the resulting density distribution can, however, be significantly altered, similar to a near-field diffraction regime in optics. We illustrate our findings with a simple model and realistic quantum Monte Carlo simulations for bosonic atoms, and compare the latter to experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-08-15 |