Wednesday Seminar

Wednesday 15 April 2015 12:30 pm,

Institute of Physics, room 106


Quantum gravity, inflation and the Cosmic Microwave Background

cid:C87EE685-23D2-4F20-97FC-65286117E8C7

The unification of quantum theory and gravity is one of the most crucial open problems in physics. Several approaches to a theory of quantum gravity have been developed, but in order to ultimately decide which approach describes Nature best, we need testable predictions. Finding such predictions is problematic, because quantum-gravitational effects might only become sizable at energies of the order of the Planck scale. A promising scenario to look for such effects is the highly energetic inflationary phase in the very early universe.

In this talk I will give an introduction to a rather conservative approach to quantum gravity based on a canonical quantization that leads to the Wheeler-DeWitt equation. I will present how this approach has been applied to study how quantum fluctuations of space-time are influenced by quantum-gravitational effects during inflation and whether the resulting corrections to the power spectra of primordial fluctuations can be observed in the Cosmic Microwave Background.

 

MSc Manuel Krämer

Institute of Physics, University of Szczecin