Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-01-04
Phys. Rev. A 79, 053625 (2009)
Physics
Condensed Matter
Statistical Mechanics
5 pages, 1 figure, updated references and figure, published version
Scientific paper
10.1103/PhysRevA.79.053625
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 BEC 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 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.
Bulgac Aurel
Yoon Sukjin
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