Non-perturbative propagators in quantum gravity
High Energy Physics - Theory
2021-05-12 v1 General Relativity and Quantum Cosmology
Abstract
We employ non-perturbative renormalisation group methods to compute the full momentum dependence of propagators in quantum gravity in general dimensions. We disentangle all different graviton and Faddeev-Popov ghost modes and find qualitative differences in the momentum dependence of their propagators. This allows us to reconstruct the form factors quadratic in curvature from first principles, which enter physical observables like scattering cross sections. The results are qualitatively stable under variations of the gauge fixing choice.
Keywords
Cite
@article{arxiv.2105.04566,
title = {Non-perturbative propagators in quantum gravity},
author = {Benjamin Knorr and Marc Schiffer},
journal= {arXiv preprint arXiv:2105.04566},
year = {2021}
}
Comments
41 pages, 8 figures, 1 ancillary Mathematica notebook