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Journal articles
Propagation of collective pair excitations in disordered Bose superfluids
Abstract : We study the effect of disorder on the propagation of collective excitations in a disordered Bose superfluid. We incorporate local density depletion induced by strong disorder at the meanfield level, and formulate the transport of the excitations in terms of a screened scattering problem. We show that the competition of disorder, screening, and density depletion induces a strongly non-monotonic energy dependence of the disorder parameter. In three dimensions, it results in a rich localization diagram with four different classes of mobility spectra, characterized by either no or up to three mobility edges. Implications on experiments with disordered ultracold atoms are discussed.
Cited literature [35 references]
https://hal-iogs.archives-ouvertes.fr/hal-01143356
Contributor : Lih-King Lim <>
Submitted on : Wednesday, April 22, 2015 - 9:56:32 AM
Last modification on : Wednesday, September 16, 2020 - 5:45:22 PM
Long-term archiving on: : Tuesday, April 18, 2017 - 10:49:44 PM
Contributor : Lih-King Lim <>
Submitted on : Wednesday, April 22, 2015 - 9:56:32 AM
Last modification on : Wednesday, September 16, 2020 - 5:45:22 PM
Long-term archiving on: : Tuesday, April 18, 2017 - 10:49:44 PM
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