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C. Henkel, T. O. Sauer, and N. P. Proukakis
Cross-over to quasi-condensation: mean-field theories and beyond
J. Phys. B 50 (2017) 114002, special issue "Addressing Quantum Many-body Problems with Cold Atoms and Molecules".


    We analyze the cross-over of a homogeneous one-dimensional Bose gas 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.

[ 1701.03133 ] [ DOI ]

file generated: 4 Jan 2018

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