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- Title
Upper Bound of Barrow Entropy Index from Black Hole Fragmentation.
- Authors
Xia, Jiayi; Ong, Yen Chin
- Abstract
Both classical and quantum arguments suggest that if Barrow entropy is correct, its index δ must be energy-dependent, which would affect the very early universe. Based on thermodynamic stability that sufficiently large black holes should not fragment, we argue that Barrow entropy correction must be small, except possibly at the Planckian regime. Furthermore, the fact that a solar mass black hole does not fragment implies an upper bound δ ≲ O (10 − 3) , which surprisingly lies in the same range as the bound obtained from some cosmological considerations assuming fixed δ. This indicates that allowing δ to run does not raise its allowed value. We briefly comment on the case of Kaniadakis entropy.
- Subjects
BLACK holes; SCHWARZSCHILD black holes; ENTROPY
- Publication
Universe (2218-1997), 2024, Vol 10, Issue 4, p177
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe10040177