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 | |
Commentaires | |
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