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arXiv · 1002.3925

Critical velocity of flowing supersolids of dipolar Bose gases in optical lattices

Ippei Danshita·Daisuke Yamamoto
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Abstract

We study superfluidity of supersolid phases of dipolar Bose gases in two-dimensional optical lattices. We perform linear stability analyses for the corresponding dipolar Bose-Hubbard model in the hardcore boson limit to show that a supersolid can have stable superflow until the flow velocity reaches a certain critical value. The critical velocity for the supersolid is found to be significantly smaller than that for a conventional superfluid phase. We propose that the critical velocity can be used as a signature to identify the superfluidity of the supersolid phase in experiment.

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Ippei Danshita, Daisuke Yamamoto. 2010-08-05. Critical velocity of flowing supersolids of dipolar Bose gases in optical lattices. https://doi.org/10.1103/physreva.82.013645

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