2021/01/31 by Raúl Carballo-Rubio, Francesco Di Filippo, Stefano Liberati +2 · 99 citations
Mathematics · Physics and Astronomy · #Apparent horizon #Astronomy #Black Holes and Theoretical Physics #Black hole (networking) #Black hole thermodynamics #Classical mechanics #Cosmology and Gravitation Theories #Event horizon #Geometry #Gravitation #Gravitational collapse #Hawking radiation #Horizon #Instability #Mathematics #Noncommutative and Quantum Gravity Theories #Physics #Quantum #Quantum gravity #Quantum mechanics #Singularity #Theoretical physics #gr-qc
paper · pdf · doi:10.1007/jhep05(2021)132
published in Journal of High Energy Physics 2021(5) (Springer Nature) · 17 pages, 5 figures. Major changes in the presentation to improve clarity, physical conclusions unchanged, matches the version accepted on JHEP
arxiv created 2021/04/21 · openalex publication_date 2021/05/01 · arxiv updated 2021/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.