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Momentum distribution and correlation function of quasicondensates in elongated traps

F. Gerbier·J. H. Thywissen·S. Richard·M. Hugbart·P. Bouyer·A. Aspect
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Abstract

We calculate the spatial correlation function and momentum distribution of a phase-fluctuating, elongated three-dimensional condensate, in a trap and in free expansion. We take the inhomogeneous density profile into account {\it{via}} a local density approximation. We find an almost Lorentzian momentum distribution, in stark contrast with a Heisenberg-limited Thomas-Fermi condensate.

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F. Gerbier, J. H. Thywissen, S. Richard, M. Hugbart, P. Bouyer, A. Aspect. 2003-07-04. Momentum distribution and correlation function of quasicondensates in elongated traps. https://doi.org/10.1103/physreva.67.051602

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