Non-universal lower bound for the shear viscosity to entropy density ratio

Abstract

The lower bound of the shear viscosity to entropy density ratio is examined using an exact representation of the ratio through the density of states. It is shown that the lower bound in a generic physical system is not universal, its value is determined by the entropy density. Some examples of physical systems are discussed in the paper where one can expect violation of the conformal 1/4pi value.

14 pages, 2 figures, revtex4; references added, minor corrections in the text

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Cited by in corpus (7)

• Quasi-Particle Theory of Shear and Bulk Viscosities of Hadronic Matter
• Shear and bulk viscosities of the gluon plasma in a quasiparticle description
• Fluid dynamical equations and transport coefficients of relativistic gases with non-extensive statistics
• Nuclear and Quark Matter at High Temperature
• Violation of Universal Lower Bound for the Shear Viscosity to Entropy Density Ratio in Dark Energy Dominated Accretion
• Shear viscosity over entropy density ratio with extended quasi-particles
• Shear Viscosity in Weakly Coupled N-Component Scalar Field Theories