Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série RENC-THEO
Domaines hep-th
Date Jeudi 16 Janvier 2025
Heure 10:00
Institut IHP
Salle Grisvard (314)
Nom de l'orateur Zwikel
Prenom de l'orateur Celine
Addresse email de l'orateur czwikel [at] perimeterinstitute [dot] ca
Institution de l'orateur Perimeter Institute
Titre Symmetries of the gravitational scattering in the absence of peeling
Résumé The asymptotic structure of spacetime with a vanishing cosmological constant is central to discussing gravitational radiation and gravitational scattering. In asymptotically flat spacetimes, the peeling property prescribes a decay rate for the Weyl tensor as one approaches the null boundary. However, there are compelling motivations for relaxing this peeling condition, leading to a polyhomogeneous rather than polynomial expansion in Bondi gauge. In this talk, I will review these motivations and explore the implications of introducing logarithmic terms into the asymptotic expansion. I will discuss how these modifications affect the symmetry structure of such spacetimes and the consequences on soft theorems. Furthermore, I will present new logarithmic evolution equations and flux-balance laws, which point to the existence of an infinite hierarchy of subleading logarithmic soft graviton theorems.
Numéro de preprint arXiv 2407.07978
Commentaires
Fichiers attachés
  • TalkAbsenceofPeeling.pdf (956945 bytes) OPEN

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