Transport coefficients of strongly coupled gauge theories: insights from string theory

Physics – Nuclear Physics – Nuclear Theory

Scientific paper

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10 pages, 2 figures; contribution to the proceedings of the workshop on Quark-Gluon Plasma Thermalization, August 10-12, 2005,

Scientific paper

10.1140/epja/i2005-10301-2

The transport properties of certain strongly coupled thermal gauge theories can be determined from their effective description in terms of gravity or superstring theory duals. Here we provide a short summary of the results for the shear and bulk viscosity, charge diffusion constant, and the speed of sound in supersymmetric strongly interacting plasmas. We also outline a general algorithm for computing transport coefficients in any gravity dual. The algorithm relates the transport coefficients to the coefficients in the quasinormal spectrum of five-dimensional black holes in asymptotically anti de Sitter space.

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