Holography and the speed of sound at high temperatures

Abstract

We show that in a general class of strongly interacting theories at high temperatures the speed of sound approaches the conformal value c_s^2=1/3 universally from_below_. This class includes theories holographically dual to a theory of gravity coupled to a single scalar field, representing the operator of the scale anomaly.

4 pages, corrected typos

References in corpus (2)

• Mimicking the QCD equation of state with a dual black hole
• Thermodynamics and bulk viscosity of approximate black hole duals to finite temperature quantum chromodynamics

Cited by in corpus (1)

• Chiral MHD description of a perfect magnetized QGP using the effective NJL model in a strong magnetic field