Graviton fluctuations erase the cosmological constant
arXiv:1704.08040 · doi:10.1016/j.physletb.2017.08.002
Abstract
Graviton fluctuations induce strong non-perturbative infrared renormalization effects for the cosmological constant. The functional renormalization flow drives a positive cosmological constant towards zero, solving the cosmological constant problem without the need to tune parameters. We propose a simple computation of the graviton contribution to the flow of the effective potential for scalar fields. Within variable gravity we find that the potential increases asymptotically at most quadratically with the scalar field. With effective Planck mass proportional to the scalar field, the solutions of the derived cosmological equations lead to an asymptotically vanishing cosmological "constant" in the infinite future, providing for dynamical dark energy in the present cosmological epoch. Beyond a solution of the cosmological constant problem, our simplified computation also entails a sizeable positive graviton-induced anomalous dimension for the quartic Higgs coupling in the ultraviolet regime, substantiating the successful prediction of the Higgs boson mass within the asymptotic safety scenario for quantum gravity.
extended discussion, new references, 14 pages, 2 figures
References in corpus (9)
- Cosmology and the Fate of Dilatation Symmetry
- Exact evolution equation for the effective potential
- Asymptotically Safe Lorentzian Gravity
- Bimetric Renormalization Group Flows in Quantum Einstein Gravity
- Search of scaling solutions in scalar-tensor gravity
- Background Independence and Asymptotic Safety in Conformally Reduced Gravity
- Emergent scale symmetry: Connecting inflation and dark energy
- Conformal sector of Quantum Einstein Gravity in the local potential approximation: non-Gaussian fixed point and a phase of unbroken diffeomorphism invariance
- Gauge symmetry from decoupling
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