Shear Viscosity from Gauss-Bonnet Gravity with a Dilaton Coupling

Abstract

We calculate the shear viscosity of field theories with gravity duals of Gauss-Bonnet gravity with a non-trivial dilaton using AdS/CFT. We find that the dilaton filed has a non-trivial contribution to the ratio of shear viscosity over entropy density and after imposing causal constraint for the boundary field theory, the new lower bound $4/25\pi$, obtained from pure Gauss-Bonnet gravity, may have a small violation.

17 pages, no figures, version to appear in PRD

References in corpus (15)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Viscosity, Black Holes, and Quantum Field Theory
• Viscosity Bound and Causality Violation
• Beyond eta/s = 1/4pi
• A Note on Thermodynamics of Black Holes in Lovelock Gravity
• Shear Viscosity from Effective Couplings of Gravitons
• Resolving disagreement for eta/s in a CFT plasma at finite coupling
• Universal holographic hydrodynamics at finite coupling
• Is there a "most perfect fluid" consistent with quantum field theory?
• Shear viscosity of boost invariant plasma at finite coupling
• Shear viscosity of CFT plasma at finite coupling
• Comment on "Is There a "Most Perfect Fluid" Consistent with Quantum Field Theory?"
• The bound on viscosity and the generalized second law of thermodynamics
• The shear diffusion coefficient for generalized theories of gravity
• The status of the KSS bound and its possible violations (How perfect can a fluid be?)

Cited by in corpus (7)

• Higher derivative effects on eta/s at finite chemical potential
• Higher Derivative Corrections to Shear Viscosity from Graviton's Effective Coupling
• Black Holes in the Dilatonic Einstein-Gauss-Bonnet Theory in Various Dimensions III -- Asymptotically AdS Black Holes with $k=\pm 1$ --
• Shear Viscosity to Entropy Density Ratio in Six Derivative Gravity
• R^2 Corrections to Asymptotically Lifshitz Spacetimes
• Landscape versus Swampland for Higher Derivative Gravity
• Viscosity to entropy density ratio: violation of the lower bound at small temperatures