Phys. Rev. Lett. 81, 5262–5265 (1998)Decoherence of Bose-Einstein Condensates in Traps at Finite TemperatureReceived 29 June 1998; published in the issue dated 14 December 1998 The phase diffusion of the order parameter of trapped Bose-Einstein condensates at temperature kBT≫ħω̅ is determined, which gives the fundamental limit of the linewidth Δν of an atom laser. In addition a prediction of the number fluctuations in the condensate and their correlation time τc is made and a general relation for Δντc is derived from the fluctuation-dissipation relation. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.5262
DOI:
10.1103/PhysRevLett.81.5262
PACS:
03.75.Fi, 05.30.Jp, 67.40.Db, 67.40.Fd
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