Momentum isotropisation in random potentials
  When particles are multiply scattered by a random potential, their momentum distribution becomes isotropic on average. We study this quantum dynamics numerically and with a master equation. We show how to measure the elastic scattering time as well as characteristic isotropisation times, which permit to reconstruct the scattering phase function, even in rather strong disorder. 
T. Plisson, T. Bourdel, C. A. M\"uller
cond-mat.quant-gas cond-mat.dis-nn