arXiv:0712.2917·v2·High Energy Physics — Theory
Comment on "Viscous hydrodynamics relaxation time from AdS/CFT correspondence"
Makoto Natsuume🇯🇵 · Takashi Okamura🇯🇵
Abstract
This is a comment to hep-th/0703243. The paper determined the relaxation time tau_pi of the shear viscous stress for the N=4 SYM from AdS/CFT correspondence. The purpose of this comment is to point out that the value of tau_pi is 3 times larger than their result if one takes into account an additional term in the hydrodynamic equation.
Comments: 2 pages, ReVTeX4