Finite temperature effects in trapped Fermi gases with population imbalance

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.021602· OSTI ID:20853009

Chien, C -C; Qijin, Chen; Yan, He; Levin, K ^[1]

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1. James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)

We study the finite temperature T behavior of trapped Fermi gases as they undergo BCS-Bose-Einstein condensation (BEC) crossover, in the presence of a population imbalance. Our results, in qualitative agreement with recent experiments, show how the superfluid phase transition is directly reflected in the particle density profiles. We demonstrate that at T{ne}0 and in the near-BEC and unitary regimes, the polarization is excluded from the superfluid core. Importantly, a substantial polarization fraction is carried by a normal region of the trap having strong pair correlations, which we associate with noncondensed pairs or the 'pseudogap phase'.

• OSTI ID: 20853009
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CORRELATIONS
DENSITY
FERMI GAS
FERMIONS
PHASE TRANSFORMATIONS
POLARIZATION
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TRAPPING
TRAPS