Statut  Confirmé 
Série  MATHIHES 
Domaines  hepth 
Date  Mercredi 22 Novembre 2017 
Heure  14:00 
Institut  IHES 
Salle  Amphithéâtre Léon Motchane 
Nom de l'orateur  Vargas 
Prenom de l'orateur  Vincent 
Addresse email de l'orateur  
Institution de l'orateur  ENS, Paris 
Titre  Liouville conformal field theory and the DOZZ formula (1/4) 
Résumé  Liouville conformal field theory (LCFT hereafter), introduced by Polyakov in his 1981 seminal work "Quantum geometry of bosonic strings", can be seen as a random version of the theory of Riemann surfaces. LCFT appears in Polyakov's work as a 2d version of the Feynman path integral with an exponential interaction term. Since then, LCFT has emerged in a wide variety of contexts in the physics literature and in particular recently in relation with 4d supersymmetric gauge theories (via the AGT conjecture). A major issue in theoretical physics was to solve the theory, namely compute the correlation functions. In this direction, an intriguing formula for the three point correlations of LCFT was proposed in the middle of the 90's by DornOtto and ZamolodchikovZamolodchikov, the celebrated DOZZ formula. The purpose of the course is twofold (based on joint works with F. David, A. Kupiainen and R. Rhodes). First, I will present a rigorous probabilistic construction of Polyakov's path integral formulation of LCFT. The construction is based on the Gaussian Free Field. Second, I will show that the three point correlation functions of the probabilistic construction indeed satisfy the DOZZ formula. This establishes an explicit link between probability theory (or statistical physics) and the socalled conformal bootstrap approach of LCFT. 
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Commentaires  Cours de l'IHES 
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