Long-range correlations of density in a Bose-Einstein condensate   expanding in a random potential
  We study correlations of atomic density in a weakly interacting Bose-Einstein condensate, expanding diffusively in a random potential. We show that these correlations are long-range and that they are strongly enhanced at long times. Density at distant points exhibits negative correlations. 
N. Cherroret, S.E. Skipetrov