Lifetime of angular momentum in a rotating strongly interacting Fermi gas

Details Lifetime of angular momentum in a rotating strongly interacting Fermi gas Lifetime of angular momentum in a rotating strongly interacting Fermi gas

2009-03-20

arxiv.org/abs/0903.3530v1

Phys. Rev. A 79, 053628 (2009)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 6 figures

Scientific paper

10.1103/PhysRevA.79.053628

We investigate the lifetime of angular momentum in an ultracold strongly interacting Fermi gas, confined in a trap with controllable ellipticity. To determine the angular momentum we measure the precession of the radial quadrupole mode. We find that in the vicinity of a Feshbach resonance the deeply hydrodynamic behavior in the normal phase leads to a very long lifetime of the angular momentum. Furthermore, we examine the dependence of the decay rate of the angular momentum on the ellipticity of the trapping potential and the interaction strength. The results are in general agreement with the theoretically expected behavior for a Boltzmann gas.

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