Viscous hydrodynamics relaxation time from AdS/CFT

Details Viscous hydrodynamics relaxation time from AdS/CFT Viscous hydrodynamics relaxation time from AdS/CFT

2007-03-27

arxiv.org/abs/hep-th/0703243v2

Phys.Rev.D76:025027,2007

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, Mathematica script included in the source; v2: typo in (28) fixed, statement about electric/magnetic modes corrected

Scientific paper

10.1103/PhysRevD.76.025027

We consider an expanding boost-invariant plasma at strong coupling using the AdS/CFT correspondence for N=4 SYM. We determine the relaxation time in second order viscous hydrodynamics and find that it is around thirty times shorter than weak coupling expectations. We find that the nonsingularity of the dual geometry in the string frame necessitates turning on the dilaton which leads to a nonvanishing expectation value for tr F^2 behaving like tau^(-10/3).

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