The asymptotic safety scenario and scalar field inflation

TL;DR

This paper investigates how quantum gravity corrections within the asymptotic safety scenario can lead to accelerated expansion in the early universe and affect observable cosmological perturbations.

Contribution

It explores the possibility of inflation driven by asymptotic safety quantum gravity with a scalar field, linking fixed point behavior to cosmological phenomena.

Findings

Quantum gravity corrections can induce accelerated expansion.

The fixed point regime influences cosmic microwave background perturbations.

Scalar field dynamics are compatible with asymptotic safety scenarios.

Abstract

We study quantum gravity corrections to early universe cosmology as resulting within the asymptotic safety scenario. We analyse if it is possible to obtain accelerated expansion in the regime of the renormalisation group fixed point in a theory with Einstein-Hilbert gravity and a scalar field. We show how this phase impacts cosmological perturbations observed in the cosmic microwave background.