ICTS:29417

Video URL

Renormalisation of a postquantum theory of classical gravity

Renormalisation of a postquantum theory of classical gravity

(2024). Renormalisation of a postquantum theory of classical gravity. SciVideos. https://youtu.be/dE-_EF0aEK4

Renormalisation of a postquantum theory of classical gravity. SciVideos, Aug. 25, 2024, https://youtu.be/dE-_EF0aEK4 

          @misc{ scivideos_ICTS:29417,
            doi = {},
            url = {https://youtu.be/dE-_EF0aEK4},
            author = {},
            keywords = {},
            language = {en},
            title = {Renormalisation of a postquantum theory of classical gravity},
            publisher = {},
            year = {2024},
            month = {aug},
            note = {ICTS:29417 see, \url{https://scivideos.org/icts-tifr/29417}}
          }
Jonathan Oppenheim
Talk numberICTS:29417
Source RepositoryICTS-TIFR
Source EventQuantum Information, Quantum Field Theory and Gravity
Collection

Abstract

I present a consistent theory of classical systems coupled to quantum ones via the path integral formulation. In the classical limit, this is the path integral for stochastic processes like Brownian motion. We apply the formalism to general relativity, since it's reasonable to question whether spacetime should have a quantum nature given its geometric description. In contrast to perturbative quantum gravity, the pure gravity theory is formally renormalisable, and doesn't suffer from negative norm ghosts. This allows for both tabletop experiments and astrophyscical tests of the quantum nature of spacetime.