Localization of an inhomogeneous Bose-Einstein condensate in a moving   random potential
  We study the dynamics of a harmonically trapped quasi-one-dimensional Bose-Einstein condensate subjected to a moving disorder potential of finite extent. We show that, due to the inhomogeneity of the sample, only a percentage of the atoms is localized at supersonic velocities of a random potential. We find that this percentage can be sensitively increased by introducing suitable correlations in the disorder potential such as those provided by random dimers. 
Ardavan Alamir, Pablo Capuzzi and Patrizia Vignolo
cond-mat.quant-gas