Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity
High Energy Physics - Theory
2020-08-31 v1
Abstract
We show that the classical equations of gravity follow from a thermodynamic relation, dQ = T dS, where S is taken to be the Wald entropy, applied to a local Rindler horizon at any point in spacetime. Our approach works for all diffeomorphism-invariant theories of gravity. This suggests that classical gravity may be thermodynamic in origin.
Cite
@article{arxiv.0903.1176,
title = {Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity},
author = {Maulik K. Parikh and Sudipta Sarkar},
journal= {arXiv preprint arXiv:0903.1176},
year = {2020}
}
Comments
9 pages, Latex, 1 figure