Quantum gravity signatures in the late Universe
OA Location
Author(s)
Toomey, Michael W
Koushiappas, Savvas M
Alexandre, Bruno
Magueijo, João
Type
Journal Article
Abstract
We calculate deviations in cosmological observables as a function of parameters in a class of connection-based models of quantum gravity. In this theory nontrivial modifications to the background cosmology can occur due to a distortion of the wave function of the Universe at the transition from matter to dark energy domination (which acts as a “reflection” in connection space). We are able to exclude some regions of parameter space and show with projected constraints that future experiments like DESI will be able to further constrain these models. An interesting feature of this theory is that there exists a region of parameter space that could naturally alleviate the S8 tension.
Date Issued
2023-10-15
Date Acceptance
2023-09-13
Citation
Physical Review D, 2023, 108 (8)
ISSN
2470-0010
Publisher
American Physical Society (APS)
Journal / Book Title
Physical Review D
Volume
108
Issue
8
Copyright Statement
© 2023 American Physical Society
Identifier
http://dx.doi.org/10.1103/physrevd.108.083507
Publication Status
Published
Article Number
083507
Date Publish Online
2023-10-06