Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 23 Mars 2023
Heure 10:00
Institut IHP
Salle 314
Nom de l'orateur Castro
Prenom de l'orateur Alejandra
Addresse email de l'orateur
Institution de l'orateur Cambridge
Titre Keeping matter in the loop in dS_3 quantum gravity
Résumé In this talk I will present our proposal for a mechanism that couples matter fields to three-dimensional de Sitter quantum gravity. Our construction is based on the Chern-Simons formulation of three-dimensional Euclidean gravity, and it centers on a collection of Wilson loops winding around Euclidean de Sitter space. We coin this object a Wilson spool. To construct the spool, we build novel representations of su(2). To evaluate the spool, we adapt and exploit several known exact results in Chern-Simons theory. Our proposal correctly reproduces the one-loop determinant of a free massive scalar field on S^3 as G_N->0. Moreover, allowing for quantum metric fluctuations, it can be systematically evaluated to any order in perturbation theory.
Numéro de preprint arXiv
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