Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-03-29
Phys. Rev. D 81, 124040 (2010)
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
v1: 20 pages; no figures. v2: Sec 4 added; 23 pages
Scientific paper
10.1103/PhysRevD.81.124040
I show that the principle of equipartition, applied to area elements of a surface which are in equilibrium at the local Davies-Unruh temperature, allows one to determine the surface number density of the microscopic spacetime degrees of freedom in any diffeomorphism invariant theory of gravity. The entropy associated with these degrees of freedom matches with the Wald entropy for the theory. This result also allows one to attribute an entropy density to the spacetime in a natural manner. The field equations of the theory can then be obtained by extremising this entropy. Moreover, when the microscopic degrees of freedom are in local thermal equilibrium, the spacetime entropy of a bulk region resides on its boundary.
No associations
LandOfFree
Surface Density of Spacetime Degrees of Freedom from Equipartition Law in theories of Gravity 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 Surface Density of Spacetime Degrees of Freedom from Equipartition Law in theories of Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface Density of Spacetime Degrees of Freedom from Equipartition Law in theories of Gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-80063