Speaker
Natascha Riahi
(Faculty of Physics, University of Vienna)
Description
The application of unimodular quantum gravity to the model of a flat, homogeneous and isotropic Universe with a scalar field yields predictions for late-time quantum gravity effects. We could identify conditions on the classical dynamics of the scalar field that imply growing uncertainties for the cosmological observables. These conditions are in particular fulfilled for a scalar field determined by an exponential potential that can be considered as a phenomenological model for the matter in our Universe. We further investigate the dynamics of quantum corrections for the Hubble parameter and the matter density for the special cases of a de-Sitter and a stiff matter Universe.
Primary author
Natascha Riahi
(Faculty of Physics, University of Vienna)
