By the same authors

From the same journal

From the same journal

Graviton backreaction on the local cosmological expansion in slow-roll inflation

Research output: Contribution to journalArticlepeer-review

Author(s)

Department/unit(s)

Publication details

JournalClassical and Quantum Gravity
DateAccepted/In press - 22 Apr 2021
DatePublished (current) - 3 Jun 2021
Issue number13
Volume38
Number of pages41
Original languageEnglish

Abstract

We compute the graviton one-loop correction to the expectation value of the local expansion rate in slow-roll inflation, with both slow-roll parameters finite. The calculation is based on a recent method to explicitly construct gauge-invariant observables in perturbative quantum gravity at all orders in perturbation theory, and it is particularly suited in cases of highly-symmetrical space-time backgrounds. Our analysis adds to recent calculations of that correction in de Sitter space-time and in single-field inflation with constant deceleration. In the former case a vanishing one-loop correction was found, while in the latter the quantum backreaction produces a secular effect that accelerates the expansion. The quantum correction we describe here produces a finite secular effect that can either accelerated or decelerate the background expansion, depending on the value of the slow-roll parameters.

Bibliographical note

© 2021 The Author(s).

    Research areas

  • Perturbative Quantum Gravity, Gauge-invariant Observables, Hubble Rate, Inflation

Discover related content

Find related publications, people, projects, datasets and more using interactive charts.

View graph of relations