PIRSA:24010076

Video URL

https://pirsa.org/24010076

Asymptotically safe quantum gravity on foliated spacetimes - VIRTUAL

Saueressig, F. (2024). Asymptotically safe quantum gravity on foliated spacetimes - VIRTUAL. Perimeter Institute for Theoretical Physics. https://pirsa.org/24010076

Saueressig, Frank. Asymptotically safe quantum gravity on foliated spacetimes - VIRTUAL. Perimeter Institute for Theoretical Physics, Jan. 11, 2024, https://pirsa.org/24010076 

          @misc{ scivideos_PIRSA:24010076,
            doi = {10.48660/24010076},
            url = {https://pirsa.org/24010076},
            author = {Saueressig, Frank},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Asymptotically safe quantum gravity on foliated spacetimes - VIRTUAL},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2024},
            month = {jan},
            note = {PIRSA:24010076 see, \url{https://scivideos.org/pirsa/24010076}}
          }

Frank Saueressig Radboud Universiteit Nijmegen

Talk numberPIRSA:24010076
DOI10.48660/24010076
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Incorporating time poses a challenge for all quantum gravity programs primarily build around Euclidean spacetimes. This talk surveys how the gravitational asymptotic safety program may address this challenge by encoding the gravitational degrees of freedom via the Arnowitt-Deser-Misner (ADM) decomposition of the spacetime metric. This formulation equips spacetime with a foliation structure singling out a preferred direction. This structure may then take the role of time in the Lorentzian framework. Within this setting, we will outline recent results related to the Wilsonian renormalization group flow of the graviton two-point function including the infrared attractors rendering the graviton massless. Furthermore, we will explain how these results generalize to Lorentzian signature spacetimes and briefly comment on potential applications in the context of cosmology.

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Zoom link https://pitp.zoom.us/j/98382991491?pwd=SmtpMTRTK2NUMEpuN3laa0pIWWs2UT09