Zeroth Sound Modes of Dilute Fermi Gas with Arbitrary Spin

Details Zeroth Sound Modes of Dilute Fermi Gas with Arbitrary Spin Zeroth Sound Modes of Dilute Fermi Gas with Arbitrary Spin

1998-10-06

arxiv.org/abs/cond-mat/9810064v1

Physics

Condensed Matter

10 pages, 2 figures

Scientific paper

Motivated by the recent success of optical trapping of alkali bosons, we have studied the zeroth sound modes of dilute Fermi gases with arbitrary spin-f, which are spin-S excitations ($0\leq S\leq 2f$). The dispersion of the mode (S) depends on a single Landau parameter $F^{(S)}$, which is related to the scattering lengths of the system through a simple formula. Measurement of (even a subset of) these modes in finite magnetic fields will enable one to determine all the interaction parameters of the system.

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