Bose Condensed Gas in Strong Disorder Potential With Arbitrary Correlation Length

Details Bose Condensed Gas in Strong Disorder Potential With Arbitrary Correlation Length Bose Condensed Gas in Strong Disorder Potential With Arbitrary Correlation Length

2006-07-21

arxiv.org/abs/cond-mat/0607546v2

Appl. Phys. B 86, 395-398 (2007)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Author information under http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir

Scientific paper

We study the properties of a dilute Bose condensed gas at zero temperature in the presence of a strong random potential with arbitrary correlation length. Starting from the underlying Gross-Pitaevskii equation, we use the random phase approximation in order to get a closed integral equation for the averaged density distribution which allows to determine both the condensate and the superfluid density. The obtained results generalize those of Huang and Meng (HM) to strong disorder. In particular, we find the critical value of the disorder strength, where the superfluid phase disappears by a first-order phase transition. We show how this critical value changes as a function of the correlation length.

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