Viscous relaxation and collective oscillations in a trapped Fermi gas near the unitarity limit

Details Viscous relaxation and collective oscillations in a trapped Fermi gas near the unitarity limit Viscous relaxation and collective oscillations in a trapped Fermi gas near the unitarity limit

2004-09-24

arxiv.org/abs/cond-mat/0409660v2

Phys.Rev.A71:033607,2005

Physics

Condensed Matter

Statistical Mechanics

10 pages, 9 figures; proof version, corrected typo in Eq. (23); accepted for publication in PRA

Scientific paper

10.1103/PhysRevA.71.033607

The viscous relaxation time of a trapped two-component gas of fermions in its normal phase is calculated as a function of temperature and scattering length, with the collision probability being determined by an energy-dependent s-wave cross section. The result is used for calculating the temperature dependence of the frequency and damping of collective modes studied in recent experiments, starting from the kinetic equation for the fermion distribution function with mean-field effects included in the streaming terms.

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