Terminating black holes in asymptotically free quantum gravity

Cosimo Bambi, Daniele Malafarina, Leonardo Modesto

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


We study the homogeneous gravitational collapse of a spherical cloud of matter in a super-renormalizable and asymptotically free theory of gravity. We find a picture that differs substantially from the classical scenario. The central singularity appearing in classical general relativity is replaced by a bounce, after which the cloud re-expands indefinitely. We argue that a black hole, strictly speaking, never forms. The collapse only generates a temporary trapped surface, which can be interpreted as a black hole when the observational timescale is much shorter than the one of the collapse. However, it may also be possible that the gravitational collapse produces a black hole and that after the bounce the original cloud of matter evolves into a new universe.

Original languageEnglish
Article number2767
Pages (from-to)1-10
Number of pages10
JournalEuropean Physical Journal C
Issue number2
Publication statusPublished - Feb 2014

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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