An effective action for asymptotically safe gravity

Abstract

Asymptotically safe theories of gravitation have received great attention in recent times. In this framework an effective action embodying the basic features of the renormalized flow around the non-gaussian fixed point is derived and its implications for the early universe are discussed. In particular, a "landscape" of a countably infinite number of cosmological inflationary solutions characterized by an unstable de Sitter phase lasting for a large enough number of e-folds is found.

5 pages, to appear as a Rapid Communication in Physical Review D

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• An asymptotically safe solution to the U(1) triviality problem
• Curvature dependence of quantum gravity
• Viability of quantum-gravity induced ultraviolet completions for matter
• Asymptotically safe inflation from quadratic gravity
• From renormalization group flows to cosmology
• Multi-scale gravity and cosmology
• Asymptotically Safe Starobinsky Inflation
• Inflation in scale-invariant theories of gravity
• Constraining power of asymptotic safety for scalar fields
• Towards conditions for black-hole singularity-resolution in asymptotically safe quantum gravity
• Scale Setting for Self-consistent Backgrounds
• Cosmological bounds on the field content of asymptotically safe gravity-matter models
• On the physical mechanism underlying Asymptotic Safety
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• Bouncing and emergent cosmologies from ADM RG flows
• Renormalization group scale-setting from the action - a road to modified gravity theories
• Consistent early and late time cosmology from the RG flow of gravity
• Infrared fixed point in quantum Einstein gravity
• Avoidance of singularities in asymptotically safe Quantum Einstein Gravity
• Gravitational antiscreening in stellar interiors
• Asymptotically Safe gravity and non-singular inflationary Big Bang with vacuum birth
• Higgs inflation and quantum gravity: An exact renormalisation group approach
• Improved Reissner-Nordström-(A)dS Black Hole in Asymptotic Safety
• Universality and symmetry breaking in conformally reduced quantum gravity
• Brans-Dicke theory in the local potential approximation
• How universe evolves with cosmological and gravitational constants
• Planck constraints on Higgs modulated reheating of renormalization group improved inflation
• On the cutoff identification and the quantum improvement in asymptotically safe gravity
• Critical behaviors of black hole in an asymptotically safe gravity with cosmological constant
• Renormalizability of alternative theories of gravity: differences between power counting and entropy argument
• Quantum Phase Transitions in the BKL Universe
• Will-Nordtvedt PPN formalism applied to renormalization group extensions of general relativity
• Solar System constraints on Renormalization Group extended General Relativity: The PPN and Laplace-Runge-Lenz analyses with the external potential effect
• Neutron Stars in Palatini $R+\alpha R^2$ and $R+\alpha R^2+\beta Q$ Theories
• Next step in gravity and cosmology: fundamental theory or data-driven models?
• Black holes in $f(R)$ gravity coupled to nonlinear electromagnetic fields
• Renormalization Group-Improved Gravitational Action: A Lagrangian Framework
• Scales and hierachies in asymptotically safe quantum gravity: a review
• Invariant Renormalization-Group improvement