Bosons in Disordered Optical Potentials
arXiv:cond-mat/0609195 · doi:10.1007/s10909-007-9392-z
Abstract
In this work we systematically investigate the condensate properties, superfluid properties and quantum phase transitions in interacting Bose gases trapped in disordered optical potentials. We numerically solve the Bose-Hubbard Hamiltonian exactly for different: (a) types of disorder, (b) disorder strengths, and (c) interatomic interactions. The three types of disorder studied are: quasiperiodic disorder, uniform random disorder and random speckle-type disorder. We find that the Bose glass, as identified by Fisher et al [Phys. Rev. B {\bf 40}, 546 (1989)], contains a normal condensate component and we show how the three different factors listed above affect it.
4 pages, 4 figures (low res) v2 Title,Abstract,Introduction: changes; Figure 3: Add label to axis