Momentum distribution and correlation function of quasicondensates in   elongated traps
  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. 
F. Gerbier, J. H. Thywissen, S. Richard, M. Hugbart, P. Bouyer, A.   Aspect