Fermi Gases in Slowly Rotating Traps: Superfluid vs Collisional Hydrodynamics

Details Fermi Gases in Slowly Rotating Traps: Superfluid vs Collisional Hydrodynamics Fermi Gases in Slowly Rotating Traps: Superfluid vs Collisional Hydrodynamics

2003-05-12

arxiv.org/abs/cond-mat/0305268v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.91.070401

The dynamic behavior of a Fermi gas confined in a deformed trap rotating at low angular velocity is investigated in the framework of hydrodynamic theory. The differences exhibited by a normal gas in the collisional regime and a superfluid are discussed. Special emphasis is given to the collective oscillations excited when the deformation of the rotating trap is suddenly removed or when the rotation is suddenly stopped. The presence of vorticity in the normal phase is shown to give rise to precession and beating phenomena which are absent in the superfluid phase.

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