Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates

Details Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates

2003-03-17

arxiv.org/abs/cond-mat/0303308v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.91.010406

We measure the intensity correlation function of two interfering spatially displaced copies of a phase fluctuating Bose-Einstein Condensate (BEC). It is shown that this corresponds to a measurement of the phase correlation properties of the initial condensate. Analogous to the method used in the stellar interferometer experiment of Hanbury Brown and Twiss, we use spatial intensity correlations to determine the phase coherence lengths of elongated BECs. We find good agreement with our prediction of the correlation function and confirm the expected coherence length.

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