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Cosmological perturbation theory and quantum gravity
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Author(s)
Department / unit(s)
Publication details
| Journal | Journal of High Energy Physics |
|---|---|
| Journal publication date | 4 Aug 2016 |
| Issue number | 32 |
| Volume | 2016 |
| Number of pages | 20 |
| Original language | English |
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.
Bibliographical note
© The Author(s) 2016.
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