Model metrics for quantum black hole evolution: Gravitational collapse, singularity resolution, and transient horizons

TL;DR

This paper introduces a class of quantum gravity-inspired, time-dependent spherically symmetric metrics modeling gravitational collapse, singularity resolution, and horizon dynamics, with implications for black hole lifetime and evaporation.

Contribution

It presents a novel class of metrics capturing quantum effects in black hole evolution, including bounce dynamics and horizon behavior, extending classical models.

Findings

Black hole lifetime scales as a power of mass, including Hawking evaporation time $M^{3}$.

Metrics model horizon formation and evaporation following a matter bounce.

Parameter controls the bounce speed and black hole lifetime.

Abstract

It is widely accepted that curvature singularity resolution should be a feature of quantum gravity. We present a class of time-dependent asymptotically flat spherically symmetric metrics that model gravitational collapse in quantum gravity. The metrics capture intuitions associated with the dynamics of singularity resolution, and horizon formation and evaporation following a matter bounce. A parameter in the metric associated with the speed of the bounce determines black hole lifetime as a power of its mass; this includes the Hawking evaporation time $M^{3}$.