Speaker
Marc Geiller
(École Normale Supérieure de Lyon)
Description
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.
External references
- 22100017
- 92d77331-f9e5-4e4b-82ca-d48d83e150f7
- 4ec3473f-470a-491a-ab2a-bccb2088072f
