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On the Structure of the Vacuum in Quantum Gravity: A View from the Asymptotic Safety Scenario
Open AccessArticle

The Inflationary Mechanism in Asymptotically Safe Gravity

Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
Universe 2019, 5(8), 189; https://doi.org/10.3390/universe5080189
Received: 16 July 2019 / Revised: 16 August 2019 / Accepted: 18 August 2019 / Published: 20 August 2019
According to the asymptotic safety conjecture, gravity is a renormalizable quantum field theory whose continuum limit is defined by an interacting fixed point of the renormalization group flow. In these proceedings, we review some implications of the existence of this nontrivial fixed point in cosmological contexts. Specifically, we discuss a toy model exemplifying how the departure from the fixed-point regime can explain the approximate scale-invariance of the power spectrum of temperature fluctuations in the cosmic microwave background. View Full-Text
Keywords: renormalization group flow; asymptotically safe gravity; inflationary cosmology renormalization group flow; asymptotically safe gravity; inflationary cosmology
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Platania, A. The Inflationary Mechanism in Asymptotically Safe Gravity. Universe 2019, 5, 189.

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