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Sound waves in strongly coupled non-conformal gauge theory plasma

Paolo Benincasa·Alex Buchel·Andrei O. Starinets
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Abstract

Using gauge theory/gravity duality we study sound wave propagation in strongly coupled non-conformal gauge theory plasma. We compute the speed of sound and the bulk viscosity of N=2^* supersymmetric SU(N_c) Yang-Mills plasma at a temperature much larger than the mass scale of the theory in the limit of large N_c and large 't Hooft coupling. The speed of sound is computed both from the equation of state and the hydrodynamic pole in the stress-energy tensor two-point correlation function. Both computations lead to the same result. Bulk viscosity is determined by computing the attenuation constant of the sound wave mode.

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Paolo Benincasa, Alex Buchel, Andrei O. Starinets. 2005-11-10. Sound waves in strongly coupled non-conformal gauge theory plasma. https://doi.org/10.1016/j.nuclphysb.2005.11.005

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