Speaker
Description
The evolution of our Universe in cosmic time is determined by a scaling solution of the functional renormalisation flow associated to a fixed point. Scaling solutions are highly predictive since they have to cover the whole field range for the effective scalar potential or the whole momentum range for the graviton propagator. For a given particle content quantum gravity fixes cosmology in terms of at most a few relevant parameters. We discuss the possibility that the dominant relevant mass scale for deviations from the scaling solution is substantially below the eV scale. In this case the Planck mass and particle masses arise from spontaneous breaking of quantum scale symmetry by the cosmological value of a scalar field. The scaling potential for this field predicts both inflation and dynamical dark energy. This setting solves the cosmological constant problem without any tuning of parameters.
