Dimensional and Temperature Crossover in Trapped Bose Gases

Details Dimensional and Temperature Crossover in Trapped Bose Gases Dimensional and Temperature Crossover in Trapped Bose Gases

2003-03-22

arxiv.org/abs/cond-mat/0303483v2

Physics

Condensed Matter

One figure added, typos corrected, refernces added

Scientific paper

We investigate the long-range phase coherence of homogeneous and trapped Bose gases as a function of the geometry of the trap, the temperature, and the mean-field interactions in the weakly interacting limit. We explicitly take into account the (quasi)condensate depletion due to quantum and thermal fluctuations, i.e., we include the effects of both phase and density fluctuations. In particular, we determine the phase diagram of the gas by calculating the off-diagonal one-particle density matrix and discuss the various crossovers that occur in this phase diagram and the feasibility of their experimental observation in trapped Bose gases.

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