On superfluidity of asymmetric mixture of fermions: How two wrongs make a right

The existence and stability of the superfluid state in a mixture of two fermion species with different masses and chemical potentials is investigated with respect to the asymmetry between the species. It is found that the mass asymmetry between the two types of particles can be effectively compensated by the asymmetry in their chemical potentials, this way increasing the range of the parameters, which allow the superfluid state.