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Holography and the Speed of Sound

    https://doi.org/10.1142/9789814304030_0021Cited by:0 (Source: Crossref)
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    Abstract:

    We study the approach of the speed of sound towards the value at high temperatures in a general class of strongly interacting theories. This class includes theories holographically dual to a theory of gravity coupled to a single scalar field, representing the operator of the scale anomaly. We show that quite universally the conformal value is approached from below and give a generic argument for why this has to be so.