Comment on "Black Hole Entropy: A Closer Look"
General Relativity and Quantum Cosmology
2021-03-23 v2 Statistical Mechanics
Data Analysis, Statistics and Probability
Abstract
In a recent paper [Entropy 2020, 22(1), 17] C. Tsallis states that entropy -- as in Shannon's or Kullback-Leiber's definitions -- is inadequate to interpret black hole entropy and suggests that a new non-additive functional should take the role of entropy. Here we counter argue by explaining the important distinction between the properties of extensivity and additivity, the latter is fundamental for entropy while the former is a property of particular thermodynamical systems that is not expected on black holes. We also point out other debatable statements in his analysis of black hole entropy.
Cite
@article{arxiv.2008.13744,
title = {Comment on "Black Hole Entropy: A Closer Look"},
author = {Pedro Pessoa and Bruno Arderucio Costa},
journal= {arXiv preprint arXiv:2008.13744},
year = {2021}
}