Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series RENC-THEO
Subjects hep-th
Date Thursday 16 January 2025
Time 10:00
Institute IHP
Seminar Room Grisvard (314)
Speaker's Last Name Zwikel
Speaker's First Name Celine
Speaker's Email Address czwikel [at] perimeterinstitute [dot] ca
Speaker's Institution Perimeter Institute
Title Symmetries of the gravitational scattering in the absence of peeling
Abstract 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.
arXiv Preprint Number 2407.07978
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Attachments
  • TalkAbsenceofPeeling.pdf (956945 bytes) OPEN

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