Sound waves in strongly coupled nonconformal gauge theory plasma
Abstract
Using gauge theory/gravity duality we study sound wave propagation in strongly coupled nonconformal gauge theory plasma. We compute the speed of sound and the bulk viscosity of N=2 supersymmetric SU(N) YangMills plasma at a temperature much larger than the mass scale of the theory in the limit of large N and large 't Hooft coupling. The speed of sound is computed both from the equation of state and the hydrodynamic pole in the stressenergy tensor twopoint correlation function. Both computations lead to the same result. Bulk viscosity is determined by computing the attenuation constant of the sound wave mode.
 Publication:

Nuclear Physics B
 Pub Date:
 January 2006
 DOI:
 10.1016/j.nuclphysb.2005.11.005
 arXiv:
 arXiv:hepth/0507026
 Bibcode:
 2006NuPhB.733..160B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 37 pages, Nuclear Physics B version