PIRSA:24010076 Scientific Series Quantum Gravity

DOI10.48660/24010076

Series: Quantum Gravity

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

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

@misc{ pirsa_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},
  year = {2024},
  month = {jan},
  note = {PIRSA:24010076 see, \url{https://pirsa.org}}
}

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

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