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. The density at distant points exhibits negative correlations.
Cherroret
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Laboratoire de Physique et Modélisation des Milieux Condensés, Université Joseph Fourier, CNRS, 25 rue des Martyrs, BP 166, 38042 Grenoble, France.
Skipetrov
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