Journal
PHYSICS LETTERS B
Volume 699, Issue 4, Pages 301-304Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2011.04.009
Keywords
Gauge/gravity duality; Finite-temperature field theory
Funding
- Cluster of Excellence for Fundamental Physics - Origin and Structure of the Universe
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A very famous result of gauge/gravity duality is the universality of the ratio of shear viscosity to entropy density in every field theory holographically dual to classical, two-derivative (Einstein) gravity. We present a way to obtain deviation from this universality by breaking the rotational symmetry spontaneously. In anisotropic fluids additional shear modes exist and their corresponding shear viscosities may be non-universal. We confirm this by explicitly calculating the shear viscosities in a transversely isotropic background, a p-wave superfluid, and study its critical behavior. This is a first decisive step towards further applications of gauge/gravity duality to physical systems. (C) 2011 Elsevier B.V. All rights reserved.
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