Two Definitions of Superfluid Density

Details Two Definitions of Superfluid Density Two Definitions of Superfluid Density

1999-07-14

arxiv.org/abs/cond-mat/9907203v1

Physics

Condensed Matter

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

Scientific paper

10.1103/PhysRevB.61.11282

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.

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