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arXiv · 0807.0018

Spin Collective Modes of Two-Species Fermi Liquids: Helium-3 and Atomic Gases near the Feshbach Resonance

H. P. Dahal·S. Gaudio·J. D. Feldmann·K. S. Bedell
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Abstract

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.

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H. P. Dahal, S. Gaudio, J. D. Feldmann, K. S. Bedell. 2008-06-30. Spin Collective Modes of Two-Species Fermi Liquids: Helium-3 and Atomic Gases near the Feshbach Resonance. https://doi.org/10.1103/physreva.78.035601

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