2016 CAP Congress / Congrès de l'ACP 2016

Cosmology from Quantum Gravity

14 Jun 2016, 16:15

30m

Colonel By D103 (University of Ottawa)

Invited Speaker / Conférencier invité Theoretical Physics / Physique théorique (DTP-DPT) T3-4 Quantum Gravity and Quantum Cosmology (DTP) / Gravité quantique et cosmologie quantique (DPT)

Speaker

Edward Wilson-Ewing (Max Planck Institute for Gravitational Physics (Albert Einstein)

Description

I will explain how the large-scale cosmological dynamics can be obtained from the hydrodynamics of condensate states of quantum gravity (to be specific, isotropic group field theory condensate states in the Gross-Pitaevskii approximation). The correct Friedmann equations are recovered in the semi-classical limit for appropriate choices of the parameters in the action for the group field theory, and quantum gravity corrections arise in the high-curvature regime causing a bounce which generically resolves the big-bang and big-crunch singularities.