Condensate superfluidity and infrared structure of the single-particle Green’s function: The Josephson relation
Markus Holzmann, Gordon Baym
DOI 10.1103/PhysRevB.76.092502 · Physical Review B
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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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