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GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Quantum Cosmology

GR 9.2: Vortrag

Donnerstag, 3. März 2016, 08:50–09:10, VMP6 HS A

How does canonical quantum gravity affect inflationary perturbations? — David Brizuela¹, Claus Kiefer², and •Manuel Krämer³ — ¹Fisika Teorikoa eta Zientziaren Historia Saila, UPV/EHU, 644 P.K., 48080 Bilbao, Spain — ²Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany — ³Instytut Fizyki, Uniwersytet Szczeciński, ul. Wielkopolska 15, 70-451 Szczecin, Poland

We present detailed calculations for quantum-gravitational corrections to the power spectra of gauge-invariant scalar and tensor perturbations during inflation. We use canonical quantum gravity with the Wheeler--DeWitt equation as our formalism and perform a semiclassical Born--Oppenheimer type of approximation to obtain a Schrödinger equation with quantum-gravitational correction terms. As a first step, we carry out our calculation for a pure de Sitter universe and find that the correction terms lead to an enhancement of power on the largest scales. Furthermore, we present numerical methods to give an estimate for the modification of the corrections in the case of slow-roll inflation.