Statut  Confirmé 
Série  LPTENSHE 
Domaines  hepth 
Date  Mardi 6 Décembre 2022 
Heure  14:00 
Institut  LPENS 
Salle  E239 
Nom de l'orateur  Banerjee 
Prenom de l'orateur  Avik 
Addresse email de l'orateur  
Institution de l'orateur  ENS Paris 
Titre  Horizon Cap beyond equilibrium 
Résumé  Computing realtime SchwingerKeldysh (SK) correlation functions away from equilibrium stands out to be a theoretically outstanding as well as phenomenologically relevant problem in the holographic approach to the strongly interacting manybody systems. However, the realization of the bulk analogue of the SK contour away from equilibrium has remained elusive within the holographic framework for a long time. Lately, a promising (Horizon crosscap) prescription in this context has been put forward by CrossleyGloriossoLiu, which however mostly uses it in a static black hole background with slowlyvarying probe dynamics. This talk is based on an attempt to implement this prescription in a truly dynamical geometry that is dual to a Bjorken flow in the boundary a simple toy model describing the expansion and cooling of the hadronic matter produced in the heavy ion collision. We will explicitly compute the SK correlations of the scalar fluctuations of the Bjorken flow in a systematic latetime expansion, amenable to a Borel resummation. In this context, I will also discuss our newly developed matrix method which reproduces various known results and also gives an elegant way of computing the SK correlation functions beyond equilibrium. Finally, I will conclude with a set of open problems in this context. 
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