Beyond eta/s = 1/4pi
High Energy Physics - Theory
2009-03-19 v3
Abstract
We use low-energy effective description of gauge theory/string theory duality to argue that the Kovtun-Son-Starinets viscosity bound is generically violated in superconformal gauge theories with non-equal central charges . We present new examples (of string theory constructions and of gauge theories) where the bound is violated in a controllable setting. We consider the comparison of results from AdS/CFT calculations to the QCD plasma in the context of this discussion.
Cite
@article{arxiv.0812.2521,
title = {Beyond eta/s = 1/4pi},
author = {Alex Buchel and Robert C. Myers and Aninda Sinha},
journal= {arXiv preprint arXiv:0812.2521},
year = {2009}
}
Comments
44 pages, v2: Minor changes to numerics in section 4, references added, v3: published version