Relativistic BCS-BEC Crossover at Finite Temperature and Its Application to Color Superconductivity

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dc.creatorHe, Lianyi
dc.creatorZhuang, Pengfei
dc.date2007-05-11
dc.date2007-09-12
dc.date.accessioned2026-07-07T10:55:29Z
dc.date.available2026-07-07T10:55:29Z
dc.descriptionThe non-relativistic $G_0 G$ formalism of BCS-BEC crossover at finite temperature is extended to relativistic fermion systems. The uncondensed pairs contribute a pseudogap to the fermion excitations. The theory recovers the BCS mean field approximation at zero temperature and the non-relativistic results in a proper limit. For massive fermions, when the coupling strength increases, there exist two crossovers from the weak coupling BCS superfluid to the non-relativistic BEC state and then to the relativistic BEC state. For color superconductivity at moderate baryon density, the matter is in the BCS-BEC crossover region, and the behavior of the pseudogap is quite similar to that found in high temperature superconductors.
dc.description13 pages, 7 figures. V2: comparision with other theories and new results on color superconductivity are added. V3: version published in PRD
dc.identifierhttps://arxiv.org/abs/0705.1634
dc.identifierhttp://arxiv.org/abs/0705.1634
dc.identifierPhys.Rev.D76:056003,2007
dc.identifierdoi:10.1103/PhysRevD.76.056003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186096
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectSuperconductivity
dc.subjectNuclear Theory
dc.titleRelativistic BCS-BEC Crossover at Finite Temperature and Its Application to Color Superconductivity
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