Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity

Details Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity

2009-03-06

arxiv.org/abs/0903.1176v1

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, Latex, 1 figure

Scientific paper

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.

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