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
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Cited by in corpus (6)
- Stochastic Mean-Field Theory for the Disordered Bose-Hubbard Model
- Gutzwiller approach to the Bose-Hubbard model with random local impurities
- Equilibrium phases of two-dimensional bosons in quasi-periodic lattices
- Noise Correlation Scalings: Revisiting the Quantum Phase Transition in Incommensurate Lattices with Hard-Core Bosons
- Finite-size effects in Anderson localization of one-dimensional Bose-Einstein condensates
- Correlations and superfluidity of a one-dimensional Bose gas in a quasiperiodic potential