Violation of the holographic bulk viscosity bound

Alex Buchel
2012 Physical Review D  
Motivated by gauge theory/string theory correspondence, a lower bound on the bulk viscosity of strongly coupled gauge theory plasma was proposed in arXiv:0708.3459. We consider strongly coupled N=4 supersymmetric Yang-Mills plasma compactified on a two-manifold of constant curvature beta. We show that the effective (1+1)-dimensional hydrodynamic description of the system is governed by the bulk viscosity violating the bound of arXiv:0708.3459, once beta<0.
doi:10.1103/physrevd.85.066004 fatcat:pwfnjbnvynflxilciwnnmhsxma