# Cosmological perturbation theory and quantum gravity

May 09, 2016

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.

open access link
doi:10.1007/JHEP08(2016)032

@article{Brunetti:2016hgw,
author = "Brunetti, Romeo and Fredenhagen, Klaus and Hack,
Thomas-Paul and Pinamonti, Nicola and Rejzner, Katarzyna",
title = "{Cosmological perturbation theory and quantum gravity}",
journal = "JHEP",
volume = "08",
year = "2016",
pages = "032",
doi = "10.1007/JHEP08(2016)032",
eprint = "1605.02573",
archivePrefix = "arXiv",
primaryClass = "gr-qc",
SLACcitation = "%%CITATION = ARXIV:1605.02573;%%"
}

Keywords:

*none*