Statut  Annulé 
Série  STRLPTENSHE 
Domaines  hepth 
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, realtime 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 nondecaying 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 tworeplica 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 twosided 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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