Condensate formation with three-component ultracold fermions

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033630· OSTI ID:21541356

Salasnich, Luca ^[1]

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1. Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Dipartimento di Fisica 'Galileo Galilei', Universita di Padova, I-35131 Padova (Italy)

We investigate the formation of Bose-Einstein condensation and a population imbalance in a three-component Fermi superfluid by increasing the U(3) invariant attractive interaction. We consider the system at zero temperature in three dimensions as well as in two dimensions. Within mean-field theory, we derive explicit formulas for the number densities, the gap order parameter, the condensate density, and the condensate fraction of the uniform system and analyze them in the crossover from the Bardeen-Cooper-Schrieffer (BCS) state of Cooper pairs to the Bose-Einstein condensate (BEC) of strongly bound molecular dimers. In addition we study this Fermi mixture trapped by a harmonic potential: We calculate the density profiles of the three components and the condensate density profile of Cooper pairs in the BCS-BEC crossover.

• OSTI ID: 21541356
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BCS THEORY
BOSE-EINSTEIN CONDENSATION
COOPER PAIRS
DIMENSIONLESS NUMBERS
DIMERS
FERMIONS
HARMONIC POTENTIAL
MEAN-FIELD THEORY
MIXED STATE
NUCLEAR POTENTIAL
ORDER PARAMETERS
POPULATION INVERSION
POTENTIALS
SUPERFLUIDITY