Bonn 2020 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Quantum Gravity and Quantum Cosmology 1

GR 10.4: Talk

Wednesday, April 1, 2020, 17:15–17:30, H-HS IX

Towards a quantum Oppenheimer-Snyder model — •Tim Schmitz — Institut für Theoretische Physik, Universität zu Köln, Germany

We present a consistent canonical formulation of the flat Oppenheimer-Snyder model, including the Schwarzschild exterior. The switching between comoving and stationary observer is realized by promoting the coordinate transformation between dust proper time and Schwarzschild-Killing time to a canonical one. This leads to two different forms of the Hamiltonian constraint, both (almost) deparameterizable with regard to one of these times. A preliminary quantization of these constraints reveals a consistent picture for both observers: the singularity is avoided by a bounce.