Statut  Confirmé 
Série  RENCTHEO 
Domaines  hepth 
Date  Jeudi 16 Décembre 2021 
Heure  10:00 
Institut  IHP 
Salle  201 
Nom de l'orateur  Bonetti 
Prenom de l'orateur  Federico 
Addresse email de l'orateur  
Institution de l'orateur  Oxford University 
Titre  Symmetry TFTs from String Theory 
Résumé  The global symmetries of a ddimensional quantum field theory (QFT), and their ’t Hooft anomalies, are conveniently captured by a topological field theory (TFT) in (d+1) dimensions, which we may refer to as the Symmetry TFT of the given ddimensional QFT. This point of view has a vast range of applicability: it encompasses both ordinary symmetries, as well as generalized symmetries. In this talk, I will discuss systematic methods to compute the Symmetry TFT for QFTs realized by Mtheory on a singular, noncompact space X. The desired Symmetry TFT is extracted from the topological couplings of 11d supergravity, via reduction on the space L, the boundary of X. The formalism of differential cohomology allows us to include discrete symmetries originating from torsion in the cohomology of L. I will illustrate this framework in two classes of examples: Mtheory on an ALE space (engineering 7d SYM theory); Mtheory on CalabiYau cones (engineering 5d superconformal field theories). 
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