Black Hole Singularity Resolution in Unimodular Gravity from Unitarity
Year: 2025
Type: article
Abstract: We study the quantum dynamics of an interior planar 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 nonsingular 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.
Source: Physical Review Letters
Authors: Steffen Gielen, Lucía Menéndez-Pidal
Institutions: University of Sheffield, Universidad Complutense de Madrid
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: Leverhulme Trust, Royal Society
Award: G345816964
OpenAlex ID: W4408331094