2020/02/25 by Behrouz Mirza, Zahra Mirzaiyan, Hamideh Nadi · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole thermodynamics #Cosmology and Gravitation Theories #Entropy (arrow of time) #Mathematical physics #Physics #Planck #Planck length #Planck scale #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum gravity #Quantum mechanics #Upper and lower bounds #gr-qc
paper · pdf · doi:10.1016/j.aop.2020.168117
published as Annals of Physics 415C (2020) 168117 · 18 pages, 1 figure
openalex publication_date 2020/02/25 · arxiv created 2020/03/12 · arxiv updated 2020/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It is shown that adding hair like electric charge or angular momentum to the black hole decreases the amount of entropy emission. This motivates us to study the emission rate of entropy from black holes and conjecture a maximum limit (upper bound) on the rate of local entropy emission (S) for thermal systems in four dimensional space time and argue that this upper bound is S≃ kB √((c5)/(ℏ G)). Also by considering Rènyi entropy, it is shown that Bekenstein-Hawking entropy leads to a maximum limit for the rate of entropy emission. We also suggest an upper bound on the surface gravity of the black holes which is called Planck surface gravity. Finally we obtain a relation between maximum rate of entropy emission, Planck surface gravity and Planck temperature of black holes.