Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 20 Avril 2017
Heure 10:00
Institut IHP
Salle 314
Nom de l'orateur Niarchos
Prenom de l'orateur Vasilis
Addresse email de l'orateur
Institution de l'orateur Durham
Titre Aspects of Berry phase in QFT
Résumé Berry phase is a well-known feature of quantum mechanics. In this talk I will describe several new results about Berry phase in quantum field theory. We will see that even simple quantum field theories can exhibit non-trivial Berry phases and will discuss an explicit example in axion electrodynamics. We will also discuss a general relation between the Berry connection in conformal field theories and the connections on conformal manifolds considered previously by several authors in conformal perturbation theory. The implementation of this relation in 2d N=(2,2) and 4d N=2 superconformal field theories leads to a useful re-derivation of the tt* equations. The latter have important implications on the non-perturbative structure of certain correlation functions, which I will briefly review.
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