Causality of Holographic Hydrodynamics
نویسندگان
چکیده
We study causality violation in holographic hydrodynamics in the gauge theory/string theory correspondence, focusing on Gauss-Bonnet gravity. The value of the GaussBonnet coupling is related to the difference between the central charges of the dual conformal gauge theory. We show that, when this difference is sufficiently large, causality is violated both in the second-order truncated theory of hydrodynamics, as well as in the exact theory. We find that the latter provides more stringent constraints, which match precisely those appearing in the CFT analysis of Hofman and Maldacena.
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