期刊
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
卷 50, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6455/aa6888
关键词
quantum gases; Bose-Einstein condensation; phase transition; critical fluctuations
资金
- Deutsche Forschungsgemeinschaft [Schm-1049/7-1, Fo 703/2-1]
- EPSRC [EP/F055935/1]
- Engineering and Physical Sciences Research Council [EP/F055935/1] Funding Source: researchfish
- EPSRC [EP/F055935/1] Funding Source: UKRI
We analyze the cross-over of a homogeneous, weakly interacting Bose gas in one dimension from the ideal gas into the dense quasi-condensate phase. We review a number of mean-field theories, perturbative or self-consistent, and provide accurate evaluations of equation of state, density fluctuations, and correlation functions. A smooth crossover is reproduced by classical-field simulations based on the stochastic Gross-Pitaevskii equation and the Yang-Yang solution to the one-dimensional Bose gas.
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