From the 1 of 7 linked papers with an AI index.
7 papers
Inflation in unimodular loop quantum cosmology
Steffen Gielen, Rita B. Neves
The paper investigates inflationary dynamics within unimodular loop quantum cosmology, using a geometrically defined unimodular time and deriving both analytical and numerical solu…
Boundary conditions and Hilbert spaces in no-roll quantum cosmology
Steffen Gielen
We construct Hilbert spaces for the minisuperspace quantum cosmology of a closed Universe in the limit of extreme slow-roll inflation, in which the scalar field is approximated as…
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…
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…
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…
Black hole singularity resolution in unimodular gravity from unitarity
Steffen Gielen, LucÃa Menéndez-Pidal
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 m…