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Coupling between collective motion and quasiparticle excitations in superfluid trapped Fermi gases

Abstract : There are several situations in which the collective motion of a superfluid Fermi gas is coupled to quasiparticle excitations. Quasiparticle excitations are, for example, present at finite temperature, but also at zero temperature in the case of a rotating trap. In this paper, I present a semiclassical description of such systems, where the superfluid component is described by hydrodynamics while the normal component, formed by the quasiparticles, is described by a transport equation similar to the Vlasov equation. The coupling between the two components generates a strong damping of the collective modes. As applications of the semiclassical theory, the case of a rotating trap and several collective modes (quadrupole and scissors modes) of the trapped gas are discussed.
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http://hal.in2p3.fr/in2p3-00379961
Contributor : Sophie Heurteau <>
Submitted on : Thursday, April 30, 2009 - 10:20:01 AM
Last modification on : Thursday, November 12, 2020 - 12:26:05 PM

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Michael Urban. Coupling between collective motion and quasiparticle excitations in superfluid trapped Fermi gases. Laser Physics, MAIK Nauka/Interperiodica, 2009, 19, pp.655-663. ⟨10.1134/S1054660X09040203⟩. ⟨in2p3-00379961⟩

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