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 hard-core 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.

Original languageEnglish
Article number013645
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume82
Issue number1
DOIs
Publication statusPublished - 2010 Jul 30

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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