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GR: Fachverband Gravitation und Relativitätstheorie

GR 15: Quantengravitation und Quantenkosmologie II

GR 15.3: Talk

Thursday, March 1, 2012, 17:25–17:45, ZHG 002

Quantum gravitational effects for cosmological perturbations — •Manuel Krämer and Claus Kiefer — Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany

We discuss cosmological perturbations in the framework of canonical quantum gravity. We use a model for an inflationary universe with a perturbed scalar field and obtain the power spectrum for these perturbations by means of a semiclassical approximation to the Wheeler-DeWitt equation. We calculate quantum gravitational corrections to the power spectrum and discuss the appearance of unitarity-violating correction terms.