Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
Pierre Lugan, David Clément, Philippe Bouyer +3 more
We study an ultracold Bose gas in the presence of 1D disorder for repulsive interatomic interactions varying from zero to the Thomas-Fermi regime. We show that for weak interactions the Bose gas populates a finite number of localized single-particle Lifshits states, while for strong interactions a delocalized disordered Bose-Einstein condensate is formed. We discuss the schematic quantum-state diagram and derive the equations of state for various regimes.
arXiv:cond-mat/0610389•Physical Review Letters•Apr 27, 2007•149 citations