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On the viability of regular black holes

  • Raúl Carballo-Rubio
  • Francesco Di FilippoEmail author
  • Stefano Liberati
  • Costantino Pacilio
  • Matt Visser
Open Access
Regular Article - Theoretical Physics

Abstract

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.

Keywords

Black Holes Models of Quantum Gravity Spacetime Singularities 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Raúl Carballo-Rubio
    • 1
    • 2
  • Francesco Di Filippo
    • 1
    • 2
    Email author
  • Stefano Liberati
    • 1
    • 2
  • Costantino Pacilio
    • 1
    • 2
  • Matt Visser
    • 3
  1. 1.SISSA, International School for Advanced StudiesTriesteItaly
  2. 2.INFN Sezione di TriesteTriesteItaly
  3. 3.School of Mathematics and StatisticsVictoria University of WellingtonWellingtonNew Zealand

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