Exteriors to bouncing collapse models

TL;DR

This paper develops a broad class of spacetimes that smoothly connect to matter clouds, allowing for quantum-induced bounces, and analyzes their horizon behavior and timescales through illustrative examples.

Contribution

It introduces a flexible framework for constructing spacetimes with quantum bounce modifications in collapsing matter clouds.

Findings

The models accommodate quantum bounce effects in gravitational collapse.

Analysis of horizon dynamics in bounce scenarios.

Identification of characteristic timescales for these processes.

Abstract

We construct a large class of spacetimes that are smoothly matched to homogeneous, spherically symmetric clouds of matter. The evolution of the clouds is left arbitrary to allow for the incorporation of modifications by quantum effects, which can in particular lead to bounces. We further discuss two simple yet illustrative examples of these spacetimes, both in general terms and for a specific form of the bounce, with a focus on horizon behavior and relevant timescales.