|
Statut |
Confirmé |
|
Série |
PT-IHES |
|
Domaines |
cond-mat,hep-th,quant-ph |
|
Date |
Mardi 17 Mai 2022 |
|
Heure |
16:00 |
|
Institut |
IHES |
|
Salle |
Salle de conférences du Bâtiment Alix et Marwan Lahoud |
|
Nom de l'orateur |
Parra-Martinez |
|
Prenom de l'orateur |
Julio |
|
Addresse email de l'orateur |
|
|
Institution de l'orateur |
Caltech |
|
Titre |
Causality Constraints on Gravitational Effective Theories |
|
Résumé |
In this talk I will describe constraints from causality and unitarity on 2→2 graviton scattering in weakly-coupled gravitational effective field theories. Together, causality and unitarity imply dispersion relations that connect low-energy observables to high-energy data. Using such dispersion relations, I will explain how to derive two-sided bounds on gravitational Wilson coefficients in terms of the mass M of new higher-spin states. Such bounds imply that gravitational interactions must shut off uniformly in the limit G→0, and prove the scaling with M expected from dimensional analysis. In addition they demonstrate the gravity must be weakly coupled at all scales below Planck. Time permitting, I will comment on the experimental implications of the bounds. |
|
Numéro de preprint arXiv |
|
|
Commentaires |
https://indico.math.cnrs.fr/event/7851/ |
|
Fichiers attachés |
|
