Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Annulé
Série STR-LPT-ENS-HE
Domaines hep-th
Date Vendredi 15 Juin 2018
Heure 16:30
Institut LPTENS
Salle LPTENS library
Nom de l'orateur Shenker
Prenom de l'orateur Stephen
Addresse email de l'orateur
Institution de l'orateur Stanford
Titre Black holes and random matrices
Résumé In finite entropy systems, real-time partition functions do not decay to zero at late time. Instead, assuming random matrix universality, suitable averages exhibit a growing ``ramp'' and ``plateau'' structure. Deriving this non-decaying behavior in a large $N$ collective field description is a challenge related to one version of the black hole information problem. We describe a candidate semiclassical explanation of the ramp for the SYK model and for black holes. In SYK, this is a two-replica saddle point for the large $N$ collective fields, with zero action and a compact zero mode that leads to a linearly growing ramp. In the black hole context, the solution is a two-sided black hole that is periodically identified under a Killing time translation. We discuss but do not resolve some puzzles that arise. (Work in progress with Phil Saad and Douglas Stanford.)
Numéro de preprint arXiv
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