Finite-temperature behavior of an interspecies fermionic superfluid with population imbalance

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.011601· OSTI ID:21313178

Hao, Guo; Chien, C -C; Yan, He; Levin, K ^[1]; Qijin, Chen ^[2]

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1. Department of Physics and James Franck Institute, University of Chicago, Chicago, Illinois 60637 (United States)
2. Department of Physics and Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, Zhejiang 310027 (China)

We determine the superfluid transition temperature T{sub c} and related finite temperature phase diagrams for the entire BCS-Bose-Einstein-condensation crossover in a three-dimensional homogeneous mixture of {sup 6}Li and {sup 40}K atoms with population imbalance. Our work is motivated by the recent observation of an interspecies Feshbach resonance. Pairing fluctuation effects, which significantly reduce T{sub c} from the onset temperature for pairing (T*), provide reasonable estimates of T{sub c} and indicate that the interspecies superfluid phase should be accessible in future experiments. Although a homogeneous polarized superfluid is not stable in the ground state near unitarity, our phase diagrams show that it stabilizes at finite temperature.

• OSTI ID: 21313178
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
BOSE-EINSTEIN CONDENSATION
FERMIONS
FLUCTUATIONS
GROUND STATES
HOMOGENEOUS MIXTURES
LITHIUM
LITHIUM 6
PHASE DIAGRAMS
POPULATIONS
POTASSIUM
POTASSIUM 40
RESONANCE
SUPERFLUIDITY
THREE-DIMENSIONAL CALCULATIONS
TRANSITION TEMPERATURE
UNITARITY