Strong-coupling corrections in a super-fluid Fermi gas with repulsion
Baranov M. A., Efremov D. V., Kagan M. Yu., Mar'enko M. S., Capel H. W.
Strong-coupling corrections to the coefficients β\—β^ are calculated for the quaternary terms in the Ginzburg-Landau free energy for a superfluid Fermi gas with repulsion. The stability conditions for the anisotropic A phase are analyzed. This theory is compared with the spin-fluctuation theory of Anderson, Brinkman, and Morel [Phys. Rev. 123, 1911 (1961); A 8, 2732 (1973)]. The possible realization of superfluid phases other than A and В is discussed.