Black Hole Entropy as Causal Links
General Relativity and Quantum Cosmology
2022-10-12 v1 High Energy Physics - Theory
Abstract
We model a black hole spacetime as a causal set and count, with a certain definition, the number of causal links crossing the horizon in proximity to a spacelike or null hypersurface . We find that this number is proportional to the horizon's area on , thus supporting the interpretation of the links as the ``horizon atoms'' that account for its entropy. The cases studied include not only equilibrium black holes but ones far from equilibrium.
Cite
@article{arxiv.gr-qc/0302009,
title = {Black Hole Entropy as Causal Links},
author = {Djamel Dou and Rafael D. Sorkin},
journal= {arXiv preprint arXiv:gr-qc/0302009},
year = {2022}
}
Comments
Latex, 20 pages, 4 postscript figures, to appear in a special issue of {\it Foundations of Physics} in honor of Jacob Bekenstein, ``Thirty years of black hole physics'', edited by L. Horwitz