Cosmological perturbation theory and quantum gravity

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.

Metadata

Authors/Creators:	Brunetti, Romeo Fredenhagen, Klaus Hack, Thomas-Paul Pinamonti, Nicola Rejzner, Katarzyna Anna https://orcid.org/0000-0001-7101-5806
Copyright, Publisher and Additional Information:	© The Author(s) 2016.
Dates:	Accepted: 22 July 2016 Published: 4 August 2016
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Mathematics (York)
Depositing User:	Pure (York)
Date Deposited:	13 Mar 2017 12:00
Last Modified:	06 Dec 2023 11:45
Published Version:	https://doi.org/10.1007/JHEP08(2016)032
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.1007/JHEP08(2016)032
Related URLs:	https://arxiv.org/pdf/1605.02573v1.pdf