Zeroth Sound Modes of Dilute Fermi Gas with Arbitrary Spin
arXiv:cond-mat/9810064
Abstract
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 (). The dispersion of the mode (S) depends on a single Landau parameter , 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.
10 pages, 2 figures