Inner horizon instability and the unstable cores of regular black holes

A bstract Regular black holes with nonsingular cores have been considered in several approaches to quantum gravity, and as agnostic frameworks to address the singularity problem and Hawking’s information paradox. While in a recent work we argued that the inner core is destabilized by linear perturba...

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Bibliographic Details
Published in:The journal of high energy physics 2021-05, Vol.2021 (5), p.1-16, Article 132
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
Gravitational collapse
Gravitational waves
Gravity
High energy physics
Horizon
Perturbation
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum gravity
Quantum Physics
Regular Article - Theoretical Physics
Regularization
Relativity Theory
Spacetime
Spacetime Singularities
String Theory
Theory of relativity
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Summary:A bstract Regular black holes with nonsingular cores have been considered in several approaches to quantum gravity, and as agnostic frameworks to address the singularity problem and Hawking’s information paradox. While in a recent work we argued that the inner core is destabilized by linear perturbations, opposite claims were raised that regular black holes have in fact stable cores. To reconcile these arguments, we discuss a generalization of the geometrical framework, originally applied to Reissner-Nordtsröm black holes by Ori, and show that regular black holes have an exponentially growing Misner-Sharp mass at the inner horizon. This result can be taken as an indication that stable nonsingular black hole spacetimes are not the definitive endpoint of a quantum gravity regularization mechanism, and that nonperturbative backreation effects must be taken into account in order to provide a consistent description of the quantum-gravitational endpoint of gravitational stellar collapse.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2021)132