Terminating black holes in asymptotically free quantum gravity

The European Physical Journal C

Leonardo Modesto¹  Cosimo Bambi¹  Daniele Malafarina¹ 

[1] Department of Physics, Center for Field Theory and Particle Physics, Fudan University, 200433, Shanghai, China;

关键词: Black Hole;    Apparent Horizon;    Gravitational Collapse;    Trap Surface;    Asymptotic Freedom;   

DOI  :  10.1140/epjc/s10052-014-2767-9

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY