Thermalization of matter waves in speckle potentials
arXiv:1503.08648 · doi:10.1103/PhysRevA.92.063614
Abstract
We show that the momentum distribution of a nonlinear matter wave suddenly released with a finite velocity in a speckle potential converges, after an out-of-equilibrium evolution, to a universal Rayleigh-Jeans thermal distribution. By exploring the complete phase diagram of the equilibrated wave, we discover that for low but nonzero values of the disorder strength, a large-scale structure -a condensate- appears in the equilibrium distribution.
5 pages, 3 figures. Supplementary material added
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