Two Definitions of Superfluid Density

N. V. Prokof'ev; B. V. Svistunov

doi:10.1103/physrevb.61.11282

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arXiv · cond-mat/9907203

Two Definitions of Superfluid Density

N. V. Prokof'ev·B. V. Svistunov

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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.

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N. V. Prokof'ev, B. V. Svistunov. 1999-07-14. Two Definitions of Superfluid Density. https://doi.org/10.1103/physrevb.61.11282

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