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

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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.
8 pages, 6 figure, submitted to EPJD

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/25712

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0501456
 http://arxiv.org/abs/cond-mat/0501456
 European Physical Journal D 35 (2005) 155-163
 doi:10.1140/epjd/e2005-00056-2

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arXiv