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Bosons in Disordered Optical Potentials

Pearl J. Y. Louis·Makoto Tsubota
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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.

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Pearl J. Y. Louis, Makoto Tsubota. 2006-11-08. Bosons in Disordered Optical Potentials. https://doi.org/10.1007/s10909-007-9392-z

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