Phys. Rev. D 80, 066002 (2009) [5 pages]Holography and the speed of sound at high temperaturesReceived 6 May 2009; published 3 September 2009 We show that in a general class of strongly interacting theories at high temperatures the speed of sound approaches the conformal value cs2=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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.80.066002
DOI:
10.1103/PhysRevD.80.066002
PACS:
11.25.Tq, 11.10.Wx, 12.38.Mh, 25.75.−q
See AlsoSee Also: Aleksey Cherman, Thomas D. Cohen, and Abhinav Nellore, Bound on the speed of sound from holography, Phys. Rev. D 80, 066003 (2009). |
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