Shear Viscosity from Gauss-Bonnet Gravity with a Dilaton Coupling
High Energy Physics - Theory
2009-03-24 v2 General Relativity and Quantum Cosmology
Nuclear Theory
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 , obtained from pure Gauss-Bonnet gravity, may have a small violation.
Keywords
Cite
@article{arxiv.0901.1421,
title = {Shear Viscosity from Gauss-Bonnet Gravity with a Dilaton Coupling},
author = {Rong-Gen Cai and Zhang-Yu Nie and Nobuyoshi Ohta and Ya-Wen Sun},
journal= {arXiv preprint arXiv:0901.1421},
year = {2009}
}
Comments
17 pages, no figures, version to appear in PRD