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Trapped Bose-einstein Condensates at Finite Temperature: a Two-gas Model

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Dodd R., Burnett K., Edwards M., Clark C.
Acta Physica Polonica A
|
1998
|
vol. 93
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issue 1
45-53
EN
A simple picture describes the results of recent treatments of partially-condensed, dilute, trapped Bose gases at temperature T>0. The condensate wave function 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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