Covariant LTB collapse in models of loop quantum gravity
General Relativity and Quantum Cosmology
2025-02-19 v2
Abstract
Models of gravitational collapse provide important means to test whether non-classical space-time effects motivated for instance by quantum gravity can be realized in generic ways in physically relevant situations. Here, a detailed analysis of marginally bound Lemaitre-Tolman-Bondi space-times is given in emergent modified gravity, which in particular includes a covariant formulation of holonomy modifications usually considered in models of loop quantum gravity. As a result, generic collapse in this setting is shown to imply a physical singularity that removes the bouncing behavior seen in vacuum space-times with the same type of modifications.
Cite
@article{arxiv.2412.18054,
title = {Covariant LTB collapse in models of loop quantum gravity},
author = {Martin Bojowald and Erick I. Duque and Dennis Hartmann},
journal= {arXiv preprint arXiv:2412.18054},
year = {2025}
}
Comments
14 pages main text, 7 pages appendix. Typos corrected. Version accepted for publication in PRD