Cross-over to quasi-condensation: mean-field theories and beyond

被引：12

作者：

Henkel, Carsten ^{[1
]}

Sauer, Tim-O ^{[1
,2
]}

Proukakis, N. P. ^{[2
]}

机构：

[1] Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany

[2] Newcastle Univ, Sch Math & Stat, Joint Quantum Ctr JQC Durham Newcastle, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2017年 / 50卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

quantum gases; Bose-Einstein condensation; phase transition; critical fluctuations; BOSE-EINSTEIN CONDENSATION; GROSS-PITAEVSKII EQUATION; GAS; DYNAMICS; TEMPERATURE; SYMMETRY;

D O I：

10.1088/1361-6455/aa6888

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：19

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