Condensate superfluidity and infrared structure: the Josephson relation
Markus Holzmann, Gordon Baym
TL;DR
This paper derives the Josephson relation linking condensate density, superfluid density, and Green's function infrared structure using diagrammatic perturbation theory, applicable to finite and two-dimensional systems.
Contribution
It provides a new derivation of the Josephson relation that is valid for finite and two-dimensional superfluid systems.
Findings
Derived the Josephson relation using diagrammatic perturbation theory.
Applicable to finite and two-dimensional superfluid systems.
Links condensate density, superfluid density, and Green's function infrared structure.
Abstract
We derive the Josephson relation in a superfluid between the condensate density, the superfluid mass density, and the infrared structure of the single particle Green's function by means of diagrammatic perturbation theory. The derivation is valid for finite systems and two dimensions.
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Taxonomy
TopicsQuantum, superfluid, helium dynamics · Cold Atom Physics and Bose-Einstein Condensates · Atomic and Subatomic Physics Research