The BCS gap equation for spin-polarized fermions

Abraham Freiji, Christian Hainzl, Robert Seiringer

We study the BCS gap equation for a Fermi gas with unequal population of spin-up and spin-down states. For $\cosh ({\delta }_{\mu }/T)\le 2$, with $T$ the temperature and ${\delta }_{\mu }$ the chemical po…