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Pairing in low-density Fermi gases

Thomas Papenbrock·George F. Bertsch
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Abstract

We consider pairing in a dilute system of Fermions with a short-range interaction. While the theory is ill-defined for a contact interaction, the BCS equations can be solved in the leading order of low-energy effective field theory. The integrals are evaluated with the dimensional regularization technique, giving analytic formulas relating the pairing gap, the density, and the energy density to the two-particle scattering length.

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Thomas Papenbrock, George F. Bertsch. 1998-12-15. Pairing in low-density Fermi gases. https://doi.org/10.1103/physrevc.59.2052

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