Transport coefficients of strongly coupled gauge theories: Insights from string theory
Perimeter Institute for Theoretical Physics, 31 Caroline Street North, N2L 2Y5, Waterloo, Ontario, Canada
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Accepted: 2 January 2006
Published online: 3 August 2006
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.
PACS: 11.25.Hf Conformal field theory, algebraic structures – / 11.10.Wx Finite-temperature field theory –
© Società Italiana di Fisica and Springer-Verlag, 2006