Momentum Spectroscopy of Phase Fluctuations of an Elongated Bose-Einstein Condensate

Details Momentum Spectroscopy of Phase Fluctuations of an Elongated Bose-Einstein Condensate Momentum Spectroscopy of Phase Fluctuations of an Elongated Bose-Einstein Condensate

2003-09-11

arxiv.org/abs/cond-mat/0309273v1

Physics

Condensed Matter

Statistical Mechanics

Proceedings of the International Conference on Laser Spectroscopy (ICOLS 03), Cairns, Australia, july 2003

Scientific paper

We have measured the momentum distribution of an elongated BEC (aspect ratio of 152), for temperatures below the critical temperature. The corresponding coherence length is significantly smaller than the condensate length in a wide range of temperature, in quantitative agreement with theoretical predictions. The Lorentzian shape of the momentum spectrum supports the image of a phase fluctuating quasicondensate.

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