Black hole singularity resolution in unimodular gravity from unitarity
High Energy Physics - Theory
2025-03-12 v3 General Relativity and Quantum Cosmology
Abstract
We study the quantum dynamics of an interior planar AdS (anti-de Sitter) black hole, requiring unitarity in the natural time coordinate conjugate to the cosmological "constant of motion" appearing in unimodular gravity. Both the classical singularity and the horizon are replaced by a non-singular highly quantum region; semiclassical notions of spacetime evolution are only valid in an intermediate region. For the singularity, our results should be applicable to general black holes: unitarity in unimodular time always implies singularity resolution.
Cite
@article{arxiv.2409.03006,
title = {Black hole singularity resolution in unimodular gravity from unitarity},
author = {Steffen Gielen and Lucía Menéndez-Pidal},
journal= {arXiv preprint arXiv:2409.03006},
year = {2025}
}
Comments
6 pages, 2 figures, APS style; v2: minor changes in presentation, accepted in Physical Review Letters, v3: added Mathematica notebook