Coupling of hydrodynamics and quasiparticle motion in collective modes of superfluid trapped Fermi gases

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dc.creatorUrban, M.
dc.date2006-12-14
dc.date2007-03-27
dc.date.accessioned2026-07-07T10:21:58Z
dc.date.available2026-07-07T10:21:58Z
dc.descriptionAt finite temperature, the hydrodynamic collective modes of superfluid trapped Fermi gases are coupled to the motion of the normal component, which in the BCS limit behaves like a collisionless normal Fermi gas. The coupling between the superfluid and the normal components is treated in the framework of a semiclassical transport theory for the quasiparticle distribution function, combined with a hydrodynamic equation for the collective motion of the superfluid component. We develop a numerical test-particle method for solving these equations in the linear response regime. As a first application we study the temperature dependence of the collective quadrupole mode of a Fermi gas in a spherical trap. The coupling between the superfluid collective motion and the quasiparticles leads to a rather strong damping of the hydrodynamic mode already at very low temperatures. At higher temperatures the spectrum has a two-peak structure, the second peak corresponding to the quadrupole mode in the normal phase.
dc.description14 pages; v2: major changes (effect of Hartree field included)
dc.identifierhttps://arxiv.org/abs/cond-mat/0612361
dc.identifierhttp://arxiv.org/abs/cond-mat/0612361
dc.identifierPhys.Rev.A75:053607,2007
dc.identifierdoi:10.1103/PhysRevA.75.053607
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175353
dc.subjectOther Condensed Matter
dc.subjectNuclear Theory
dc.titleCoupling of hydrodynamics and quasiparticle motion in collective modes of superfluid trapped Fermi gases
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