The entropy of dynamical de Sitter horizons
General Relativity and Quantum Cosmology
2025-07-09 v4 High Energy Physics - Theory
Abstract
Recently Hollands, Wald and Zhang proposed a new formula for the entropy of a dynamical black hole. We lift this construction to the dynamical cosmological event horizon of an asymptotically de Sitter spacetime. By introducing a nontrivial correction term in the formula for the entropy, we generalize Gibbons and Hawking's "first law of event horizons" to non-stationary eras. We also develop the non-stationary physical process first law between two arbitrary horizon cross-sections for the cosmological event horizon.
Keywords
Cite
@article{arxiv.2503.16138,
title = {The entropy of dynamical de Sitter horizons},
author = {Jinan Zhao},
journal= {arXiv preprint arXiv:2503.16138},
year = {2025}
}