On the viability of regular black holes

A bstract The evaporation of black holes raises a number of conceptual issues, most of them related to the final stages of evaporation, where the interplay between the central singularity and Hawking radiation cannot be ignored. Regular models of black holes replace the central singularity with a no...

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Bibliographic Details
Published in:The journal of high energy physics 2018-07, Vol.2018 (7), p.1-19, Article 23
Main Authors: Carballo-Rubio, Raúl, Di Filippo, Francesco, Liberati, Stefano, Pacilio, Costantino, Visser, Matt
Format: Article
Language:English
Subjects:
Black Holes
Classical and Quantum Gravitation
Elementary Particles
Evaporation
Hawking radiation
High energy physics
Models of Quantum Gravity
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Spacetime Singularities
Stability
String Theory
Viability
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Summary:A bstract The evaporation of black holes raises a number of conceptual issues, most of them related to the final stages of evaporation, where the interplay between the central singularity and Hawking radiation cannot be ignored. Regular models of black holes replace the central singularity with a nonsingular spacetime region, in which an effective classical geometric description is available. It has been argued that these models provide an effective, but complete, description of the evaporation of black holes at all times up to their eventual disappearance. However, here we point out that known models fail to be self-consistent: the regular core is exponentially unstable against perturbations with a finite timescale, while the evaporation time is infinite, therefore making the instability impossible to prevent. We also discuss how to overcome these difficulties, highlighting that this can be done only at the price of accepting that these models cannot be fully predictive regarding the final stages of evaporation.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP07(2018)023