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Decoherence of Bose-Einstein condensates in traps at finite temperature

Robert Graham
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Abstract

The phase diffusion of the order parameter of trapped Bose-Einstein condensates at temperatures large compared to the mean trap frequency is determined, which gives the fundamental limit of the line-width of an atom laser. In addition a prediction of the correlation time of the number fluctuations in the condensate is made and related to the phase diffusion via the fluctuation-dissipation relation.

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Robert Graham. 1998-11-04. Decoherence of Bose-Einstein condensates in traps at finite temperature. https://doi.org/10.1103/physrevlett.81.5262

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