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Atypical BCS-BEC crossover induced by quantum-size effects

hal.structure.identifierDepartement Fysica
dc.contributor.authorSHANENKO, A. A.
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorCROITORU, Mihail D.
hal.structure.identifierInstitut für Theroetische Physik III
dc.contributor.authorVAGOV, A. V.
hal.structure.identifierInstitut für Theroetische Physik III
dc.contributor.authorAXT, V. M.
hal.structure.identifierSchool of Pharmacy, Physics Unit
dc.contributor.authorPERALI, A.
hal.structure.identifierDepartement Fysica
dc.contributor.authorPEETERS, F. M.
dc.date.created2012-03-15
dc.date.issued2012-09-12
dc.identifier.issn1050-2947
dc.description.abstractEnQuantum-size oscillations of the basic physical characteristics of a confined fermionic condensate are a well-known phenomenon. Its conventional understanding is based on the single-particle physics, whereby the oscillations follow the size-dependent changes in the single-particle density of states. Here we present a study of a cigar-shaped ultracold superfluid Fermi gas, which demonstrates an important many-body aspect of the quantum-size effects, overlooked previously. The many-body physics is revealed in the atypical crossover from the Bardeen-Cooper-Schrieffer (BCS) superfluid to the Bose-Einstein condensate (BEC) induced by the size quantization of the particle motion. Quantized perpendicular spectrum results in the formation of single-particle subbands (shells) so that the aggregate fermionic condensate becomes a coherent mixture of subband condensates. Each time when the lower edge of a subband crosses the chemical potential, the BCS-BEC crossover is approached in this subband, and the aggregate condensate contains both the BCS and BEC-like components.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enAtypical BCS-BEC crossover induced by quantum-size effects
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevA.86.033612
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Gaz Quantiques [cond-mat.quant-gas]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con]
dc.identifier.arxiv1203.3325
dc.description.sponsorshipEuropeSCQSR
bordeaux.journalPhysical Review A : Atomic, molecular, and optical physics [1990-2015]
bordeaux.page033612 (1-7)
bordeaux.volume86
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-00732456
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00732456v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20A%20:%20Atomic,%20molecular,%20and%20optical%20physics%20%5B1990-2015%5D&rft.date=2012-09-12&rft.volume=86&rft.issue=3&rft.spage=033612%20(1-7)&rft.epage=033612%20(1-7)&rft.eissn=1050-2947&rft.issn=1050-2947&rft.au=SHANENKO,%20A.%20A.&CROITORU,%20Mihail%20D.&VAGOV,%20A.%20V.&AXT,%20V.%20M.&PERALI,%20A.&rft.genre=article


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