Induced P-wave superfluidity within the full energy- and momentum-dependent Eliashberg approximation in asymmetric dilute Fermi gases

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.79.053625· OSTI ID:21313079

Bulgac, Aurel; Yoon, Sukjin ^[1]

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1. Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States)

We consider a very asymmetric system of fermions with an interaction characterized by a positive scattering length only. The minority atoms pair and form a Bose-Einstein condensate of dimers, while the surplus fermions interact only indirectly through the exchange of Bogoliubov sound modes. This interaction has a finite range, the retardation effects are significant, and the surplus fermions will form a P-wave superfluid. We compute the P-wave pairing gap in the BCS and Eliashberg approximations with only energy-dependence approximations, and demonstrate their inadequacy in comparison with a full treatment of the momentum and energy dependence of the induced interaction. The pairing gap computed with a full momentum and energy dependence is significantly larger in magnitude, and that makes it more likely that this new exotic paired phase could be put in evidence in atomic trap experiments.

• OSTI ID: 21313079
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 79; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
ASYMMETRY
ATOMS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
COMPARATIVE EVALUATIONS
DIMERS
ENERGY DEPENDENCE
FERMI GAS
FERMIONS
INTERACTIONS
P WAVES
SCATTERING LENGTHS
SUPERFLUIDITY