Talk by Claus Kiefer

Can quantum-gravitational effects be observed in the cosmic microwave background?

In any approach to quantum gravity, it is crucial to search 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). A scenario of slow-roll inflation is assumed. I derive concrete predictions for the power spectrum and other cosmic quantities and discuss their observability. I also present a brief comparison with other approaches.