English

Terminating black holes in asymptotically free quantum gravity

General Relativity and Quantum Cosmology 2014-02-21 v2 High Energy Astrophysical Phenomena

Abstract

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.

Keywords

Cite

@article{arxiv.1306.1668,
  title  = {Terminating black holes in asymptotically free quantum gravity},
  author = {Cosimo Bambi and Daniele Malafarina and Leonardo Modesto},
  journal= {arXiv preprint arXiv:1306.1668},
  year   = {2014}
}

Comments

10 pages, 3 figures. v2: refereed version

R2 v1 2026-06-22T00:29:46.577Z