Video URL

https://pirsa.org/21060109

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

Kiefer, C. (2021). "TIME IN QUANTUM GRAVITY - From the fundamental level to the classical limit". Perimeter Institute for Theoretical Physics. https://pirsa.org/21060109

Kiefer, Claus. "TIME IN QUANTUM GRAVITY - From the fundamental level to the classical limit". Perimeter Institute for Theoretical Physics, Jun. 15, 2021, https://pirsa.org/21060109 

          @misc{ scivideos_PIRSA:21060109,
            doi = {10.48660/21060109},
            url = {https://pirsa.org/21060109},
            author = {Kiefer, Claus},
            keywords = {Quantum Foundations},
            language = {en},
            title = {"TIME IN QUANTUM GRAVITY - From the fundamental level to the classical limit"},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2021},
            month = {jun},
            note = {PIRSA:21060109 see, \url{https://scivideos.org/index.php/pirsa/21060109}}
          }

Claus Kiefer Universität zu Köln

DOI 10.48660/21060109
Source Repository PIRSA
Collection
Talk Type Conference
Subject

Abstract

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.