Atypical BCS-BEC crossover induced by quantum-size effects
| hal.structure.identifier | Departement Fysica | |
| dc.contributor.author | SHANENKO, A. A. | |
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | CROITORU, Mihail D. | |
| hal.structure.identifier | Institut für Theroetische Physik III | |
| dc.contributor.author | VAGOV, A. V. | |
| hal.structure.identifier | Institut für Theroetische Physik III | |
| dc.contributor.author | AXT, V. M. | |
| hal.structure.identifier | School of Pharmacy, Physics Unit | |
| dc.contributor.author | PERALI, A. | |
| hal.structure.identifier | Departement Fysica | |
| dc.contributor.author | PEETERS, F. M. | |
| dc.date.created | 2012-03-15 | |
| dc.date.issued | 2012-09-12 | |
| dc.identifier.issn | 1050-2947 | |
| dc.description.abstractEn | Quantum-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.iso | en | |
| dc.publisher | American Physical Society | |
| dc.title.en | Atypical BCS-BEC crossover induced by quantum-size effects | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevA.86.033612 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Gaz Quantiques [cond-mat.quant-gas] | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con] | |
| dc.identifier.arxiv | 1203.3325 | |
| dc.description.sponsorshipEurope | SCQSR | |
| bordeaux.journal | Physical Review A : Atomic, molecular, and optical physics [1990-2015] | |
| bordeaux.page | 033612 (1-7) | |
| bordeaux.volume | 86 | |
| bordeaux.issue | 3 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00732456 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00732456v1 | |
| bordeaux.COinS | ctx_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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