Gravitational collapse in Quantum Einstein Gravity

TL;DR

This paper investigates how Quantum Einstein Gravity modifies gravitational collapse, showing that quantum effects weaken singularities and enable spacetime extension beyond classical singularities, addressing fundamental issues in black hole physics.

Contribution

It demonstrates that Asymptotically Safe Gravity renders singularities gravitationally weak, allowing spacetime extension, a novel insight into quantum effects on gravitational collapse.

Findings

Quantum Gravity weakens singularities in collapse models

Spacetime can be extended beyond classical singularities

Results support the cosmic censorship hypothesis in quantum regime

Abstract

The existence of spacetime singularities is one of the biggest problems of nowadays physics. According to Penrose, each physical singularity should be covered by a "cosmic censor" which prevents any external observer from perceiving their existence. However, classical models describing the gravitational collapse usually results in strong curvature singularities, which can also remain "naked" for a finite amount of advanced time. This proceedings studies the modifications induced by Asymptotically Safe Gravity on the gravitational collapse of generic Vaidya spacetimes. It will be shown that, for any possible choice of the mass function, Quantum Gravity makes the internal singularity gravitationally weak, thus allowing a continuous extension of the spacetime beyond the singularity.