3 papers
gr-qc2025
Cyclic Kruskal Universe: a quantum-corrected Schwarzschild black hole in unitary unimodular gravity
Steffen Gielen, Sofie Ried
We analyse the physical properties of an analytical, nonsingular quantum-corrected black hole solution recently derived in a minisuperspace model for unimodular gravity under the a…
hep-th2025
Quantum Schwarzschild-(A)dS Black Holes: Unitarity and Singularity Resolution
Steffen Gielen, Sofie Ried
We consider the canonical quantisation of spherically symmetric spacetimes within unimodular gravity, leaving sign choices in the metric general enough to include both the interior…
gr-qc2024
Low-curvature quantum corrections from unitary evolution of de Sitter space
Steffen Gielen, Rita B. Neves
We study the quantum dynamics of de Sitter space formulated as a minisuperspace model with flat spatial hypersurfaces in unimodular gravity, both in the Wheeler-DeWitt approach and…