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 -