Phase fluctuations in atomic Bose gases

We improve on the Popov theory for partially Bose-Einstein condensed atomic gases by treating the phase fluctuations exactly. As a result, the theory becomes valid in arbitrary dimensions and is able to describe the low-temperature crossover between three-, two-, and one-dimensional Bose gases, whic...

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Bibliographic Details
Published in:Physical review letters 2002-02, Vol.88 (7), p.070407-070407, Article 070407
Main Authors: Andersen, J O, Al Khawaja, U, Stoof, H T C
Format: Article
Language:English
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Summary:We improve on the Popov theory for partially Bose-Einstein condensed atomic gases by treating the phase fluctuations exactly. As a result, the theory becomes valid in arbitrary dimensions and is able to describe the low-temperature crossover between three-, two-, and one-dimensional Bose gases, which is currently being explored experimentally. We consider both homogeneous and trapped Bose gases.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.88.070407