English

Alternative entropies and consistent black hole thermodynamics

General Relativity and Quantum Cosmology 2022-12-07 v1

Abstract

While the Bekenstein-Hawking entropy is the unique notion of entropy that makes classical black hole thermodynamics consistent, alternative entropy notions (R\'enyi, Tsallis, and generalized constructs) abound in the literature. We explore conditions under which they are part of a consistent horizon thermodynamics for certain classes of modified gravity black holes. We provide examples in which black hole masses and temperatures going hand-in-hand with these alternative entropies coincide with their usual counterparts associated with the Bekenstein-Hawking entropy.

Keywords

Cite

@article{arxiv.2207.07905,
  title  = {Alternative entropies and consistent black hole thermodynamics},
  author = {Shin'ichi Nojiri and Sergei D. Odintsov and Valerio Faraoni},
  journal= {arXiv preprint arXiv:2207.07905},
  year   = {2022}
}

Comments

20 pages, LateX, to appear in Int. J. Geom. Meth. Mod. Phys

R2 v1 2026-06-25T00:58:14.526Z