The partial Bondi gauge


Geiller, M. (2022). The partial Bondi gauge. Perimeter Institute. https://pirsa.org/22100017


Geiller, Marc. The partial Bondi gauge. Perimeter Institute, Oct. 05, 2022, https://pirsa.org/22100017


          @misc{ pirsa_PIRSA:22100017,
            doi = {10.48660/22100017},
            url = {https://pirsa.org/22100017},
            author = {Geiller, Marc},
            keywords = {Quantum Gravity},
            language = {en},
            title = {The partial Bondi gauge},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {oct},
            note = {PIRSA:22100017 see, \url{https://pirsa.org}}

Marc Geiller École normale supérieure (ENS)


I will review the recent construction of an extended solution space for gravity, based on a so-called partial Bondi gauge fixing. This aims at investigating the possible relaxations of the boundary conditions, in order to include for example a cosmological constant, a polyhomogeneous expansion, and an arbitrary time-dependent boundary metric. I will also explain how to properly map these results to the Newman-Penrose formalism. Finally, I will discuss the application to three-dimensional gravity, where a new asymptotic symmetry can be revealed after working out all the subtleties of the covariant phase space formalism.