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SUMMARY:Aspects of Berry phase in QFT - Vasileios Niarchos - Durham
DTSTART:20170608T120000Z
DTEND:20170608T130000Z
UID:TALK70788@talks.cam.ac.uk
CONTACT:Kenny Wong
DESCRIPTION: Berry phase is a well-known feature of quantum mechanics. In 
 this talk I will discuss several new results about Berry phase in quantum 
 field theory. We will see that even simple quantum field theories can exhi
 bit non-trivial Berry phases and will discuss an explicit example in axion
  electrodynamics. We will also discuss a general relation between the Berr
 y connection in conformal field theories and the connections on conformal 
 manifolds considered previously by several authors in conformal perturbati
 on theory. The implementation of this relation in 2d N=(2\,2) and 4d N=2 s
 uperconformal field theories leads to a useful re-derivation of the tt* eq
 uations. The latter have important implications on the non-perturbative st
 ructure of certain correlation functions in supersymmetric theories\, whic
 h I will briefly review.
LOCATION:Potter Room (first floor\, Pav. B)
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