Sound mode hydrodynamics from bulk scalar fields

T. Springer
Phys. Rev. D 79, 046003 – Published 4 February 2009

Abstract

We study the hydrodynamic sound mode using gauge/gravity correspondence by examining a generic black brane background’s response to perturbations. We assume that the background is generated by a single scalar field, and then generalize to the case of multiple scalar fields. The relevant differential equations obeyed by the gauge invariant variables are presented in both cases. Finally, we present an analytical solution to these equations in a special case; this solution allows us to determine the speed of sound and bulk viscosity for certain special metrics. These results may be useful in determining sound mode transport coefficients in phenomenologically motivated holographic models of strongly coupled systems.

  • Received 31 October 2008

DOI:https://doi.org/10.1103/PhysRevD.79.046003

©2009 American Physical Society

Authors & Affiliations

T. Springer

  • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

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Issue

Vol. 79, Iss. 4 — 15 February 2009

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