On SUGRA description of boost-invariant conformal plasma at strong coupling

Details On SUGRA description of boost-invariant conformal plasma at strong coupling On SUGRA description of boost-invariant conformal plasma at strong coupling

2008-03-24

arxiv.org/abs/0803.3421v2

AIPConf.Proc.1031:196-206,2008

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, presented at "Ten Years of AdS/CFT", December 19-21, 2007

Scientific paper

10.1063/1.2972006

We study string theory duals of the expanding boost invariant conformal gauge theory plasmas at strong coupling. The dual supergravity background is constructed as an asymptotic late-time expansion, corresponding to equilibration of the gauge theory plasma. The absence of curvature singularities in the first few orders of the late-time expansion of the dual gravitational background unambiguously determines the equilibrium equation of the state, and the shear viscosity of the gauge theory plasma. While the absence of the leading pole singularities in the gravitational curvature invariants at the third order in late-time expansion determines the relaxation time of the plasma, the subleading logarithmic singularity can not be canceled within a supergravity approximation. We comment on the possible interpretations of this singularity.

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