Shear viscosity from Gauss-Bonnet gravity with a dilaton coupling

Journal Article · Sun Mar 15 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.066004· OSTI ID:21260202

Ronggen, Cai ^[1]; Zhangyu, Nie; Yawen, Sun ^[1]; Ohta, Nobuyoshi ^[2]

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1. Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190 (China)
2. Department of Physics, Kinki University, Higashi-Osaka, Osaka 577-8502 (Japan)

We calculate the shear viscosity of field theories with gravity duals of Gauss-Bonnet gravity with a nontrivial dilaton using anti-de Sitter/conformal field theory. We find that the dilaton field has a nontrivial contribution to the ratio of shear viscosity over entropy density, and, after imposing a 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.

• OSTI ID: 21260202
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONFORMAL INVARIANCE
COUPLING
DE SITTER GROUP
DENSITY
ENTROPY
GRAVITATION
QUANTUM FIELD THEORY
SHEAR
STRING MODELS
VISCOSITY