Black brane entropy and hydrodynamics: the boost-invariant case - High Energy Physics - TheoryReport as inadecuate




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Abstract: The framework of slowly evolving horizons is generalized to the case of blackbranes in asymptotically anti-de Sitter spaces in arbitrary dimensions. Theresults are used to analyze the behavior of both event and apparent horizons inthe gravity dual to boost-invariant flow. These considerations are motivated bythe fact that at second order in the gradient expansion the hydrodynamicentropy current in the dual Yang-Mills theory appears to contain an ambiguity.This ambiguity, in the case of boost-invariant flow, is linked with a similarfreedom on the gravity side. This leads to a phenomenological definition of theentropy of black branes. Some insights on fluid-gravity duality and thedefinition of entropy in a time-dependent setting are elucidated.



Author: Ivan Booth, Michal P. Heller, Michal Spalinski

Source: https://arxiv.org/







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