2023/01/31 by Michael W. Toomey, Toomey, Michael W., Savvas M. Koushiappas +5
Physics and Astronomy · #Cosmology and Gravitation Theories #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2301.13855
We calculate deviations in cosmological observables as a function of parameters in a class of connection-based models of quantum gravity. In this theory non-trivial 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.