Spin Collective Modes of Two-Species Fermi Liquids: Helium-3 and Atomic   Gases near the Feshbach Resonance
  We present theoretical findings on the spin collective modes of a two-species Fermi liquid, prepared alternatively in a polarized equilibrium or a polarized non-equilibrium state. We explore the effects on these modes of a diverging s-wave scattering length, as occurs near a Feshbach resonance in a Fermionic atomic gas. We compare these atomic gas modes with those of the conventional Helium-3 system, and we find that they differ from the conventional systems, and that the gap and spin stiffness are tunable via the Feshbach resonance. 
H. P. Dahal, S. Gaudio, J. D. Feldmann, K. S. Bedell