Shear viscosity of a superfluid Fermi gas in the unitarity limit

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dc.creatorRupak, Gautam
dc.creatorSchaefer, Thomas
dc.date2007-07-11
dc.date.accessioned2026-07-07T11:52:46Z
dc.date.available2026-07-07T11:52:46Z
dc.descriptionWe compute the shear viscosity of a superfluid atomic Fermi gas in the unitarity limit. The unitarity limit is characterized by a divergent scattering length between the atoms, and it has been argued that this will result in a very small viscosity. We show that in the low temperature T limit the shear viscosity scales as xi^5/T^5, where the universal parameter 'xi' relates the chemical potential and the Fermi energy, mu=xi E_F. Combined with the high temperature expansions of the viscosity our results suggest that the viscosity has a minimum near the critical temperature T_c. A naive extrapolation indicates that the minimum value of the ratio of viscosity over entropy density is within a factor of ~ 5 of the proposed lower bound hbar/(4πk_B).
dc.description9 pages, 7 figures, LaTeX2e
dc.identifierhttps://arxiv.org/abs/0707.1520
dc.identifierhttp://arxiv.org/abs/0707.1520
dc.identifierPhys.Rev.A76:053607,2007
dc.identifierdoi:10.1103/PhysRevA.76.053607
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204297
dc.subjectOther Condensed Matter
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleShear viscosity of a superfluid Fermi gas in the unitarity limit
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