Collective oscillations of a trapped Fermi gas near a Feshbach resonance
arXiv:cond-mat/0312614 · doi:10.1209/epl/i2004-10001-5
Abstract
The frequencies of the collective oscillations of a harmonically trapped Fermi gas interacting with large scattering lengths are calculated at zero temperature using hydrodynamic theory. Different regimes are considered, including the molecular Bose-Einstein condensate and the unitarity limit for collisions. We show that the frequency of the radial compressional mode in an elongated trap exhibits a pronounced non monotonous dependence on the scattering length, reflecting the role of the interactions in the equation of state.
3 pages, including 1 figure