Quantum-gravitational corrections to the power spectrum for a closed universe
Abstract
We study the quantum-gravitational corrections to the power spectrum of a gauge-invariant inflationary scalar perturbations in a closed model of a universe. We consider canonical quantum gravity as an approach to quantizing gravity. This leads to the Wheeler-DeWitt equation, which has been studied by applying a semiclassical Born-Oppenheimer type of approximation. At the corresponding orders of approximation, we recover both the uncorrected and quantum-gravitationally corrected Schroedinger equations for the perturbation modes from which we calculate the quantum-gravitational corrections to the power spectrum in the slow-roll regime. The results are compared to the power spectra for the flat model of the universe.
Keywords
Cite
@article{arxiv.2302.07001,
title = {Quantum-gravitational corrections to the power spectrum for a closed universe},
author = {Tatevik Vardanyan and Claus Kiefer},
journal= {arXiv preprint arXiv:2302.07001},
year = {2023}
}
Comments
7 pages, 1 figure. Contribution to the Proceedings of the DICE2022 meeting, Castiglioncello, September 2022