Entropy Production during Asymptotically Safe Inflation
arXiv:1011.2794 · doi:10.3390/e13010274
Abstract
The Asymptotic Safety scenario predicts that the deep ultraviolet of Quantum Einstein Gravity is governed by a nontrivial renormalization group fixed point. Analyzing its implications for cosmology using renormalization group improved Einstein equations we find that it can give rise to a phase of inflationary expansion in the early Universe. Inflation is a pure quantum effect here and requires no inflaton field. It is driven by the cosmological constant and ends automatically when the renormalization group evolution has reduced the vacuum energy to the level of the matter energy density. The quantum gravity effects also provide a natural mechanism for the generation of entropy. It could easily account for the entire entropy of the present Universe in the massless sector.
17 pages, 4 figures, Invited contribution to the special issue of Entropy on "Entropy in Quantum Gravity"
References in corpus (11)
- Exact evolution equation for the effective potential
- Fixed Points of Higher Derivative Gravity
- Ultraviolet properties of f(R)-Gravity
- On the renormalization group flow of f(R)-gravity
- Spacetime Structure of an Evaporating Black Hole in Quantum Gravity
- Renormalization group improved gravitational actions: a Brans-Dicke approach
- Fixed points of quantum gravity in extra dimensions
- Functional Renormalization Group Equations, Asymptotic Safety, and Quantum Einstein Gravity
- Primordial Entropy Production and Lambda-driven Inflation from Quantum Einstein Gravity
- Living with Infinities
- A fixed point for truncated quantum Einstein gravity
Cited by in corpus (19)
- Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
- The nonperturbative functional renormalization group and its applications
- Renormalisation group and the Planck scale
- Asymptotically safe cosmology - a status report
- Non-minimal coupling in Higgs-Yukawa model with asymptotically safe gravity
- Curvature dependence of quantum gravity
- The R^2 phase-diagram of QEG and its spectral dimension
- Asymptotic safety of higher derivative quantum gravity non-minimally coupled with a matter system
- From renormalization group flows to cosmology
- Asymptotic Safety, Fractals, and Cosmology
- Formation and evaporation of quantum black holes from the decoupling mechanism in quantum gravity
- Singularity formation in asymptotically safe cosmology with inhomogeneous equation of state
- An asymptotically safe guide to quantum gravity and matter
- Lectures in Quantum Gravity
- Dimensional aspects of Lovelock-Lanczos gravity
- Renormalization Group-Improved Gravitational Action: A Lagrangian Framework
- Phenomenological footprints of Lambda varying gravity theories inspired from quantum gravity models in the multi-messenger era
- Asymptotic Safety and the Cosmic Coincidence Problem
- Renormalization group approaches to Quantum Gravity and Tensions in Modern Cosmology