Andersen JO, Al Khawaja U, Stoof HTC. Phase fluctuations in atomic Bose gases.
PHYSICAL REVIEW LETTERS 2002;
88:070407. [PMID:
11863875 DOI:
10.1103/physrevlett.88.070407]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2001] [Revised: 11/30/2001] [Indexed: 05/23/2023]
Abstract
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.
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