Casimir interaction among heavy fermions in the BCS-BEC crossover

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dc.creatorNishida, Yusuke
dc.date2008-11-11
dc.date2009-01-29
dc.date.accessioned2026-07-07T12:37:30Z
dc.date.available2026-07-07T12:37:30Z
dc.descriptionWe investigate a two-species Fermi gas with a large mass ratio interacting by an interspecies short-range interaction. Using the Born-Oppenheimer approximation, we determine the interaction energy of two heavy fermions immersed in the Fermi sea of light fermions as a function of the s-wave scattering length. In the BCS limit, we recover the perturbative calculation of the effective interaction between heavy fermions. The p-wave projection of the effective interaction is attractive in the BCS limit while it turns out to be repulsive near the unitarity limit. We find that the p-wave attraction reaches its maximum between the BCS and unitarity limits, where the maximal p-wave pairing of heavy minority fermions is expected. We also investigate the case where the heavy fermions are confined in two dimensions and the p-wave attraction between them is found to be stronger than that in three dimensions.
dc.description11 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0811.1615
dc.identifierhttp://arxiv.org/abs/0811.1615
dc.identifierPhys.Rev.A79:013629,2009
dc.identifierdoi:10.1103/PhysRevA.79.013629
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218459
dc.subjectOther Condensed Matter
dc.subjectNuclear Theory
dc.titleCasimir interaction among heavy fermions in the BCS-BEC crossover
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