Coherence length of an elongated condensate: a study by matter-wave interferometry

Details Coherence length of an elongated condensate: a study by matter-wave interferometry Coherence length of an elongated condensate: a study by matter-wave interferometry

2005-01-19

arxiv.org/abs/cond-mat/0501456v1

European Physical Journal D 35 (2005) 155-163

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 6 figure, submitted to EPJD

Scientific paper

10.1140/epjd/e2005-00056-2

We measure the spatial correlation function of Bose-Einstein condensates in the cross-over region between phase-coherent and strongly phase-fluctuating condensates. We observe the continuous path from a gaussian-like shape to an exponential-like shape characteristic of one-dimensional phase-fluctuations. The width of the spatial correlation function as a function of the temperature shows that the condensate coherence length undergoes no sharp transition between these two regimes.

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