Cosmological perturbation theory and quantum gravity

Romeo Brunetti; Klaus Fredenhagen; Thomas-Paul Hack; Nicola Pinamonti; Katarzyna Anna Rejzner

doi:10.1007/JHEP08(2016)032

Cosmological perturbation theory and quantum gravity

Romeo Brunetti, Klaus Fredenhagen, Thomas-Paul Hack, Nicola Pinamonti, Katarzyna Anna Rejzner

Mathematics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Number of pages	20
Journal	Journal of High Energy Physics
Volume	2016
Issue number	32
DOIs	https://doi.org/10.1007/JHEP08(2016)032
Publication status	Published - 4 Aug 2016

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10.1007/JHEP08(2016)032Licence: CC BY

art3A1010072FJHEP0828201629032
© The Author(s) 2016.
Final published version, 377 KBLicence: CC BY

https://arxiv.org/pdf/1605.02573v1.pdf

Kasia Rejzner
- kasia.rejzneryork.acuk
- Mathematics - Professor
Person: Academic

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AU - Fredenhagen, Klaus

AU - Hack, Thomas-Paul

AU - Pinamonti, Nicola

AU - Rejzner, Katarzyna Anna

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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.

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JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

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Cosmological perturbation theory and quantum gravity

Abstract

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Kasia Rejzner

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