Two Definitions of Superfluid Density

Abstract

We point out that two different definitions of the superfluid density - through statistical response to static gauge phase and through dynamic response to altering gauge phase - yield, generally speaking, different quantities in $d<3$. The physics leading to this difference is associated with the equilibrium statistics of supercurrent states. Some experimentally observable consequences of this fact are discussed.

Revtex, 3 pages, no figures; Submitted to Phys. Rev. B (Brief Reports)

References in corpus (1)

• Kosterlitz-Thouless transition of quantum XY model in two dimensions

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