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Hydrodynamics of Spatially Ordered Superfluids

H. T. C. Stoof·K. Mullen·M. Wallin·S. M. Girvin
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Abstract

We derive the hydrodynamic equations for the supersolid and superhexatic phases of a neutral two-dimensional Bose fluid. We find, assuming that the normal part of the fluid is clamped to an underlying substrate, that both phases can sustain third-sound modes and that in the supersolid phase there are additional modes due to the superfluid motion of point defects (vacancies and interstitials).

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H. T. C. Stoof, K. Mullen, M. Wallin, S. M. Girvin. 1995-08-18. Hydrodynamics of Spatially Ordered Superfluids. https://doi.org/10.1103/physrevb.53.5670

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