Trapped Bose-Einstein condensates at finite temperature: a two-gas model

Details Trapped Bose-Einstein condensates at finite temperature: a two-gas model Trapped Bose-Einstein condensates at finite temperature: a two-gas model

1997-12-24

arxiv.org/abs/cond-mat/9712286v1

Physics

Condensed Matter

Statistical Mechanics

10 pages, LaTeX, three .eps figures, jltp.sty (included). Acta Physica Polonica A (January 1997, in press)

Scientific paper

A simple picture describes the results of recent treatments of partially-condensed, dilute, trapped Bose gases at temperature T > 0. The condensate wavefunction is nearly identical to that of a T=0 condensate with the same number of condensate atoms, N_0. The cloud of non-condensed atoms is described by the statistical mechanics of an ideal Bose gas in the combined potentials of the magnetic trap and the cloud-condensate interaction. We provide a physical motivation for this result, show how it emerges in the Hartree-Fock-Bogoliubov-Popov approximation, and explore some of its implications for future experiments.

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