Variational self-consistent theory for trapped Bose gases at finite temperature

Details Variational self-consistent theory for trapped Bose gases at finite temperature Variational self-consistent theory for trapped Bose gases at finite temperature

2011-02-17

arxiv.org/abs/1102.3630v1

Eur. Phys. J. D 59, 427-434 (2010)

Physics

Condensed Matter

Quantum Gases

8 pages, 8 figures

Scientific paper

10.1140/epjd/e2010-00177-5

We apply the time-dependent variational principle of Balian-V\'en\'eroni to a system of self-interacting trapped bosons at finite temperature. The method leads to a set of coupled non-linear time dependent equations for the condensate density, the thermal cloud and the anomalous density. We solve numerically these equations in the static case for a harmonic trap. We analyze the various densities as functions of the radial distance and the temperature. We find an overall good qualitative agreement with recent experiments as well as with the results of many theoretical groups. We also discuss the behavior of the anomalous density at low temperatures owing to its importance to account for many-body effects.

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