Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-03-06
Physics
High Energy Physics
High Energy Physics - Theory
revtex; 5 pages; no figures
Scientific paper
I argue that the field equations of any theory of gravity which is diffeomorphism invariant must be expressible as a thermodynamic identity, TdS=dE around any event in the spacetime. This fact can be demonstrated explicitly (and rather easily) if: (a) one accepts the Noether current of the theory as providing the definition for local entropy density and (b) one is allowed to introduce the local notions of a Rindler frame, acceleration horizon and a Killing vector (related to translation in Rindler time) around any event. It is conceptually incorrect - in general - to invert this argument and obtain the field equations of the theory from the thermodynamic identity. I discuss under what conditions this may be possible. Several subtleties related to these arguments are described.
No associations
LandOfFree
Entropy density of spacetime and thermodynamic interpretation of field equations of gravity in any diffeomorphism invariant theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Entropy density of spacetime and thermodynamic interpretation of field equations of gravity in any diffeomorphism invariant theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entropy density of spacetime and thermodynamic interpretation of field equations of gravity in any diffeomorphism invariant theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-136299