| Speaker: | Manuel Kramer (KU Leuven) |
|---|---|
| Title: | The semiclassical approximation to quantum gravity and its relation to cosmological observations |
| Date (JST): | Tue, Nov 05, 2019, 15:30 - 16:45 |
| Place: | Seminar Room A |
| Related File: | 2370.pdf |
| Abstract: |
A canonical quantization of general relativity leads to the Wheeler-DeWitt equation, a functional wave equation that does not contain an explicit time dependence. By performing a systematic semiclassical approximation to this equation, one can recover a notion of time at the semiclassical level and derive a modified Schrödinger equation with quantum-gravitational correction terms. Applied to a perturbed cosmological model, these correction terms encode the fact that not only the perturbations, but also the background geometry is quantized. In this talk, I will present how to use the corrected Schrödinger equation to calculate quantum-gravity corrections to the anisotropy spectrum of the Cosmic Microwave Background, discuss their measurability and compare this method to other approaches of finding signatures of quantum gravity in the CMB. |
