Freidel, L. (2022). Local Holography and corner symmetry: A paradigm for quantum gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/22100036

MLA

Freidel, Laurent. Local Holography and corner symmetry: A paradigm for quantum gravity. Perimeter Institute for Theoretical Physics, Oct. 04, 2022, https://pirsa.org/22100036

BibTex

@misc{ scivideos_PIRSA:22100036,
doi = {10.48660/22100036},
url = {https://pirsa.org/22100036},
author = {Freidel, Laurent},
keywords = {Quantum Gravity},
language = {en},
title = {Local Holography and corner symmetry: A paradigm for quantum gravity},
publisher = {Perimeter Institute for Theoretical Physics},
year = {2022},
month = {oct},
note = {PIRSA:22100036 see, \url{https://scivideos.org/pirsa/22100036}}
}

In this introductory talk, I will present a new perspective about quantum gravity which is rooted deeply in a renewed understanding of local symmetries in Gravity that appears when we decompose gravitational systems into subsystems.
I will emphasize the central role of the corner symmetry group in capturing all the necessary data needed to glue back seamlessly quantum spacetime regions. I will present how the charge conservation associated with these symmetries encoded the dynamics of null surfaces.
Finally, I will also present how the representation theory of the corner symmetry arises and provides a representation of quantum geometry, and I will show that deformations of this symmetry can be the explanation for a fundamental planckian cut-off.
I will also mention how these symmetry groups reduce to asymptotic symmetry groups and control asymptotic gravitational dynamics when the entangling sphere is moved to infinity. If time permits, I will explain how these symmetries control asymptotic gravitational dynamics. And I will describe how they provide a new picture of the nature of quantum radiation.
Overall, this new paradigm allows to connect semi-classical gravitational physics, S-matrix theory, and non-perturbative quantum gravity techniques.
The talk's goal is to give an overall flavor of how these connections appear from an elementary understanding of symmetries.