4.4 Article

Beyond η/s=1/4π

Journal

JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 3, Pages -

Publisher

SPRINGER
DOI: 10.1088/1126-6708/2009/03/084

Keywords

Gauge-gravity correspondence; AdS-CFT Correspondence

Funding

  1. Government of Canada through Industry Canada
  2. Province of Ontario through the Ministry of Research Innovation
  3. NSERC
  4. Canadian Institute for Advanced Research

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We use a low-energy e. ective description of gauge theory/string theory duality to argue that the Kovtun-Son-Starinets viscosity bound is generically violated in super conformal gauge theories with non-equal central charges c not equal a. 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.

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