SHANENKO, A. A.; CROITORU, Mihail D.; VAGOV, A. V.; AXT, V. M.; PERALI, A.; PEETERS, F. M.

doi:10.1103/PhysRevA.86.033612

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

SHANENKO, A. A.
Departement Fysica

CROITORU, Mihail D.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

VAGOV, A. V.
Institut für Theroetische Physik III

Idioma

Article de revue

Este ítem está publicado en

Physical Review A : Atomic, molecular, and optical physics [1990-2015]. 2012-09-12, vol. 86, n° 3, p. 033612 (1-7)

American Physical Society

Resumen en inglés

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.< Leer menos

DOI

http://dx.doi.org/10.1103/PhysRevA.86.033612

Proyecto europeo

SCQSR

Orígen

Importado de Hal

Centros de investigación

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798