Asymptotically safe cosmology - a status report

Abstract

Asymptotic Safety, based on a non-Gaussian fixed point of the gravitational renormalization group flow, provides an elegant mechanism for completing the gravitational force at sub-Planckian scales. At high energies the fixed point controls the scaling of couplings such that unphysical divergences are absent while the emergence of classical low-energy physics is linked to a crossover between two renormalization group fixed points. These features make Asymptotic Safety an attractive framework for cosmological model building. The resulting scenarios may naturally give rise to a quantum gravity driven inflationary phase in the very early universe and an almost scale-free fluctuation spectrum. Moreover, effective descriptions arising from an renormalization group improvement permit a direct comparison to cosmological observations as, e.g. Planck data.

Invited review for the special issue "Testing quantum gravity with cosmology" to appear in Compte Rendus Physique A

References in corpus (8)

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• Modulated Ground State of Gravity Theories with Stabilized Conformal Factor
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Cited by in corpus (73)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
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• Dimension and Dimensional Reduction in Quantum Gravity
• Quantum gravity: a fluctuating point of view
• Upper bound on the Abelian gauge coupling from asymptotic safety
• Curvature dependence of quantum gravity
• Quantum gravity fluctuations flatten the Planck-scale Higgs potential
• Viability of quantum-gravity induced ultraviolet completions for matter
• How perturbative is quantum gravity?
• Zooming in on fermions and quantum gravity
• Effective universality in quantum gravity
• Nonminimal hints for asymptotic safety
• From renormalization group flows to cosmology
• Misalignment & Co.: (Pseudo-)scalar and vector dark matter with curvature couplings
• Correlation functions on a curved background
• Quantum Improved Schwarzschild-(A)dS and Kerr-(A)dS Space-times
• Graviton fluctuations erase the cosmological constant
• Asymptotic safety and field parametrization dependence in the f(R) truncation
• Can scale-dependent cosmology alleviate the $H_0$ tension?
• Inflation in an effective gravitational model & asymptotic safety
• Cosmological bounds on the field content of asymptotically safe gravity-matter models
• Asymptotic safety, string theory and the weak gravity conjecture
• On avoiding Ostrogradski instabilities within Asymptotic Safety
• The Asymptotically Safe Standard Model: From quantum gravity to dynamical chiral symmetry breaking
• Bouncing and emergent cosmologies from ADM RG flows
• Analytic infinite derivative gravity, $R^2$-like inflation, quantum gravity and CMB
• Asymptotic Safety: Swampland or Wonderland?
• Consistent early and late time cosmology from the RG flow of gravity
• Graviton-Mediated Scattering Amplitudes from the Quantum Effective Action
• Predictive power of grand unification from quantum gravity
• Gravitational antiscreening in stellar interiors
• Formation and evaporation of quantum black holes from the decoupling mechanism in quantum gravity
• Black Holes in Asymptotically Safe Gravity
• Recent advances in cosmological singularities
• Is scale-invariance in gauge-Yukawa systems compatible with the graviton?
• Quantum Gravity inspired nonlocal gravity model
• Gravitational instantons and anomalous chiral symmetry breaking
• A curvature bound from gravitational catalysis in thermal backgrounds
• Generalized non-local $R^2$-like inflation
• Renormalized Functional Renormalization Group
• Effective field equations and scale-dependent couplings in gravity
• Asymptotically Safe Non-Minimal Inflation
• CDT and Cosmology
• Swiss-cheese cosmologies with variable $G$ and $\Lambda$ from the renormalization group
• Singularity formation in asymptotically safe cosmology with inhomogeneous equation of state
• Renormalizability of alternative theories of gravity: differences between power counting and entropy argument
• Through a Black Hole Singularity
• An asymptotically safe guide to quantum gravity and matter
• Scale-invariance at the core of quantum black holes
• On the Renormalization Group perspective of $\alpha$-attractors
• On the quantum improved Schwarzschild black hole
• Reconstructing the graviton
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Is asymptotically safe inflation eternal?
• Cosmological framework for renormalization group extended gravity at the action level
• Shift-symmetric Horndeski gravity in the asymptotic-safety paradigm
• Gravitational Collapse in Scale-Dependent Gravity
• Type V singularities with inhomogeneous equations of state
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Time Evolution and Thermal Renormalization Group Flow in Cosmology
• Dimensional aspects of Lovelock-Lanczos gravity
• Vacuum Energy and Renormalization of the Field-Independent Term
• Renormalization Group-Improved Gravitational Action: A Lagrangian Framework
• Constraining the swiss-cheese IR-fixed point cosmology with cosmic expansion
• Causality, unitarity and stability in quantum gravity: a non-perturbative perspective
• Scales and hierachies in asymptotically safe quantum gravity: a review
• Black hole physics within $f(R)$ gravity: Quasi-normal spectra and greybody factors
• Phenomenological footprints of Lambda varying gravity theories inspired from quantum gravity models in the multi-messenger era
• Thermal RG Flow of AS Quantum Gravity
• Weyl Curvature Hypothesis in light of Quantum Backreaction at Cosmological Singularities or Bounces
• Cosmology with Logarithmic Corrected Horizon Entropy According to the Generalized Entropy and Variable-G Correspondence
• Asymptotic Safety and the Cosmic Coincidence Problem
• Renormalization group approaches to Quantum Gravity and Tensions in Modern Cosmology