Phys. Rev. A 78, 035601 (2008) [4 pages]Spin collective modes of two-species Fermi liquids: 3He and atomic gases near the Feshbach resonanceReceived 3 March 2008; published 3 September 2008 We present theoretical findings on the spin collective modes of a two-species Fermi liquid, prepared alternatively in a polarized equilibrium or a polarized nonequilibrium 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 3He system, and we find that they differ from the conventional systems, and that the gap and spin stiffness are tunable via the Feshbach resonance. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.035601
DOI:
10.1103/PhysRevA.78.035601
PACS:
03.75.Ss, 05.30.Fk, 52.55.Tn
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