The Josephson relation for the superfluid density in the BCS-BEC crossover

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dc.creatorTaylor, Edward
dc.date2008-01-29
dc.date2008-04-23
dc.date.accessioned2026-07-07T12:11:47Z
dc.date.available2026-07-07T12:11:47Z
dc.descriptionThe Josephson relation for the superfluid density is derived for a Fermi superfluid in the BCS-BEC crossover. This identity extends the original Josephson relation for Bose superfluids. It gives a simple exact relation between the superfluid density $ρ_s$ and the broken-symmetry Cooper pair order parameter $Δ_0$ in terms of the infrared limit of the pair fluctuation propagator. The same expression holds through the entire BCS-BEC crossover, describing the superfluid density of a weak-coupling BCS superfluid as well as the superfluid density of a Bose condensate of dimer molecules.
dc.descriptionPublished version
dc.identifierhttps://arxiv.org/abs/0801.4579
dc.identifierhttp://arxiv.org/abs/0801.4579
dc.identifierPhys. Rev. B 77 144521 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.144521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210335
dc.subjectOther Condensed Matter
dc.titleThe Josephson relation for the superfluid density in the BCS-BEC crossover
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