14-18 June 2021
America/Toronto timezone

"TIME IN QUANTUM GRAVITY - From the fundamental level to the classical limit"

15 Jun 2021, 10:40


Claus Kiefer (University of Cologne)


Time cannot be both absolute (as in quantum mechanics) and dynamical (as in general relativity). I present general arguments for the absence of time at the most fundamental level of quantum gravity. I discuss possible concepts that could replace it and present the recovery of standard time as an approximate concept. My discussion is restricted to quantum geometrodynamics, but I argue for the validity of my conclusions beyond that scheme.

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