Horizon thermodynamics from Einstein's equation of state

By regarding the Einstein equations as equation(s) of state, we demonstrate that a full cohomogeneity horizon first law can be derived in horizon thermodynamics. In this approach both the entropy and the free energy are derived concepts, while the standard (degenerate) horizon first law is recovered...

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Bibliographic Details
Main Authors: Devin Hansen, David Kubizňák, Robert B. Mann
Format: Article
Language:English
Published: Elsevier 2017-08-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269317303507