Status | Confirmed |
Seminar Series | SEM-CPHT |
Subjects | hep-th |
Date | Tuesday 25 June 2019 |
Time | 11:00 |
Institute | CPHT |
Seminar Room | Salle Louis Michel |
Speaker's Last Name | Ruzziconi |
Speaker's First Name | Romain |
Speaker's Email Address | |
Speaker's Institution | University ULB Brussels |
Title | The \Lambda-BMS4 group of dS4 and new boundary conditions for AdS4 |
Abstract | In this talk, I will discuss the solution space of general relativity in Bondi gauge, with non-vanishing cosmological constant. Using the dictionary between Bondi and Fefferman-Graham gauges, the analogues of the Bondi news, Bondi mass and Bondi angular momentum aspects at the boundary of generic asymptotically locally dS4 spacetimes will be identified. Then, I will introduce the \Lambda-BMS4 group as the residual symmetry group of Bondi gauge after boundary gauge fixing. This group consists in infinite dimensional non-abelian supertranslations and superrotations and it reduces in the asymptotically flat limit to the extended BMS4 group. Furthermore, I will present new boundary conditions for asymptotically locally AdS4 spacetimes which admit R times the group of area-preserving diffeomorphisms as the asymptotic symmetry group. |
arXiv Preprint Number | 1905.00971 |
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