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.
@article{arxiv.cond-mat/0210206,
title = {Phase coherence length of a Bose-Einstein condensate},
author = {F. Gerbier and S. Richard and J. H. Thywissen and M. Hugbart and P. Bouyer and A. Aspect},
journal= {arXiv preprint arXiv:cond-mat/0210206},
year = {2007}
}
Comments
to be published in the proceedings of "Cool Interactions 2002", Heidelberg, 9-13 september 2002 (Wiley)