PoS - Proceedings of Science
Volume 440 - Winter School of Theoretical Physics, Second and Third Training School of COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach" (QG-MMSchools) - Third Training School
Cornering quantum gravity
L. Ciambelli*, A. D'Alise, V. D'Esposito, D. Đorđevic, D. Fernández-Silvestre and L. Varrin
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Pre-published on: September 29, 2023
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After introducing the covariant phase space calculus, Noether's theorems are discussed, with particular emphasis on Noether's second theorem and the role of gauge symmetries. This is followed by the enunciation of the theory of asymptotic symmetries, and later its application to gravity. Specifically, we review how the BMS group arises as the asymptotic symmetry group of gravity at null infinity. Symmetries are so powerful and constraining that memory effects and soft theorems can be derived from them. The lectures end with more recent developments in the field: the corner proposal as a unified paradigm for symmetries in gravity, the extended phase space as a resolution to the problem of charge integrability, and eventually the implications of the corner proposal on quantum gravity.
DOI: https://doi.org/10.22323/1.440.0010
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