Can Effects Of Quantum Gravity Be Observed In The Cosmic Microwave Background?
Prof. Dr. Claus Kiefer (Universität zu Köln)

In any approach to quantum gravity, it is crucial to look for observational effects. In my talk, I discuss how quantum gravitational contributions to the anisotropy spectrum of the cosmic microwave background arise in the framework of quantum geometrodynamics (Wheeler-DeWitt equation). From the present non-observation of these contributions, we find a constraint on the Hubble parameter of inflation. I also compare these results with the predictions from loop quantum cosmology.