Cosmological perturbation theory and quantum gravity
General Relativity and Quantum Cosmology
2016-08-24 v1 High Energy Physics - Theory
Mathematical Physics
math.MP
Abstract
It is shown how cosmological perturbation theory arises from a fully quantized perturbative theory of quantum gravity. Central for the derivation is a non-perturbative concept of gauge-invariant local observables by means of which perturbative invariant expressions of arbitrary order are generated. In particular, in the linearised theory, first order gauge-invariant observables familiar from cosmological perturbation theory are recovered. Explicit expressions of second order quantities are presented as well.
Cite
@article{arxiv.1605.02573,
title = {Cosmological perturbation theory and quantum gravity},
author = {Romeo Brunetti and Klaus Fredenhagen and Thomas-Paul Hack and Nicola Pinamonti and Katarzyna Rejzner},
journal= {arXiv preprint arXiv:1605.02573},
year = {2016}
}
Comments
18 pages