Signal of Bose condensation in an optical lattice at finite temperature
arXiv:0705.4352 · doi:10.1103/PhysRevA.76.031602
Abstract
We discuss the experimental signal for the Bose condensation of cold atoms in an optical lattice at finite temperature. Instead of using the visibility of the interference pattern via the time-of-flight imaging, we show that the momentum space density profile in the first Brillouin zone, in particular its bimodal distribution, provides an unambiguous signal for the Bose condensation. We confirm this point with detailed calculation of the change in the atomic momentum distribution across the condensation phase transition, taking into account both the global trapping potential and the atomic interaction effects.
arXiv comment4 pages, 2 figures, replaced with the published version
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- On atomic analogue of Landau quantization
- Phase-Sensitive Detection for Unconventional Bose-Einstein Condensations
- Adiabatic Loading of Cold Bosons in Three-Dimensional Optical Lattices and Superfluid-Normal Phase Transition
- Revealing the Condensate and Non-Condensate Distributions in the Inhomogeneous Bose-Hubbard Model
- Quantum fluctuations and condensate fraction during the time-of-flight expansion
- Isentropes of spin-1 bosons in an optical lattice
- Two-step condensation of lattice bosons
- Signatures of Bose-Einstein condensation in an optical lattice