Heiselberg H, Pethick CJ, Smith H, Viverit L
NORDITA, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.
Phys Rev Lett. 2000 Sep 18;85(12):2418-21. doi: 10.1103/PhysRevLett.85.2418.
We calculate the effects of induced interactions on the transition temperature to the BCS state in dilute Fermi gases. For a pure Fermi system with two species having equal densities, the transition temperature is suppressed by a factor (4e)(1/3) approximately 2.2, and for nu fermion species, the transition temperature is increased by a factor (4e)(nu/3-1) approximately 2.2(nu-3). For mixtures of fermions and bosons the exchange of boson density fluctuations gives rise to an attractive interaction, and we estimate the increase of the transition temperature due to this effect.
