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Phase coherence length of a Bose-Einstein condensate

F. Gerbier, S. Richard, J. H. Thywissen, M. Hugbart, P. Bouyer, A. Aspect

cond-matarXiv:cond-mat/0210206

Abstract

We report on the measurement of the momentum distribution of an elongated Bose-Einstein condensate. A broadening of the distribution with increasing temperature is observed, which is clear evidence for phase fluctuations in the sample.

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