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Phys. Rev. Lett. 93, 090602 (2004) [4 pages]

Universality of the Shear Viscosity from Supergravity Duals

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Alex Buchel
Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2J 2W9, Canada and Department of Applied Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada

James T. Liu
Michigan Center for Theoretical Physics, Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan 48109-1120, USA

Received 4 March 2004; published 26 August 2004

Kovtun, Son, and Starinets proposed a bound on the shear viscosity of any fluid in terms of its entropy density. We argue that this bound is always saturated for gauge theories at large 't Hooft coupling, which admit holographically dual supergravity description.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.93.090602
DOI: 10.1103/PhysRevLett.93.090602
PACS: 11.25.Tq, 47.17.+e

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