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

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.

7 pages, 4 figures, published version

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Cited by in corpus (19)

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• Mean-field and stability analysis of two-dimensional flowing soft-core bosons modeling a supersolid
• Quantum phases of hardcore bosons with long-range interactions on a square lattice
• Dipolar Bosons in Triangular Optical Lattices: Quantum Phase Transitions and Anomalous Hysteresis
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• Interlayer-Interaction Dependence of Latent Heat in the Heisenberg Model on a Stacked Triangular Lattice with Competing Interactions
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