Phase coherence length of a Bose-Einstein condensate
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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.
to be published in the proceedings of "Cool Interactions 2002", Heidelberg, 9-13 september 2002 (Wiley)
to be published in the proceedings of "Cool Interactions 2002", Heidelberg, 9-13 september 2002 (Wiley)