TY - JOUR

T1 - Cosmological perturbation theory and quantum gravity

AU - Brunetti, Romeo

AU - Fredenhagen, Klaus

AU - Hack, Thomas-Paul

AU - Pinamonti, Nicola

AU - Rejzner, Katarzyna Anna

N1 - © The Author(s) 2016.

PY - 2016/8/4

Y1 - 2016/8/4

N2 - 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.

AB - 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.

U2 - 10.1007/JHEP08(2016)032

DO - 10.1007/JHEP08(2016)032

M3 - Article

SN - 1029-8479

VL - 2016

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 32

ER -