Density profile of a strictly two-dimensional Bose gas at finite temperature

Details Density profile of a strictly two-dimensional Bose gas at finite temperature Density profile of a strictly two-dimensional Bose gas at finite temperature

2003-09-16

arxiv.org/abs/cond-mat/0309366v1

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 4 figures

Scientific paper

10.1016/j.physb.2003.09.251

We study a Bose-condensed gas at finite temperature, in which the particles of the condensate and of the thermal cloud are constrained to move in a plane under radial harmonic confinement and interact via strictly two-dimensional collisions. The coupling parameters are obtained from a calculation of the many-body T-matrix and decreases as temperature increases through a dependence on the chemical potential and on the occupancy of excited states. We discuss the consequences on the condensate fraction and on the density profiles of the condensed and thermal components as functions of temperature, within a simplified form of the two-fluid model.

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