Hydrodynamics of Spatially Ordered Superfluids
arXiv:cond-mat/9508075 · doi:10.1103/PhysRevB.53.5670
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).
24 pages of ReVTeX and 7 uuencoded figures. Submitted for publication in Phys. Rev. B