11 avril 2016 à 15 juillet 2016
Institut Henri Poincaré
Fuseau horaire Europe/Paris


Constantin Teleman, University of California at Berkeley

Title: Twisted sectors in 2D gauge theory

Abstract: I have previously described how the 'Coulomb branch of the space of vacua' in N=4 pure 3D gauge theory for a compact Lie group serves as the classifying space for 2D A-type gauged theories (such as Gromov-Witten theory) via holomorphic symplectic calculus, as described by Kapustin and Rozansky. I will describe the space of states of the gauge theory in these terms, and explain how it generalizes the 'twisted sector' decomposition in the case of a finite group. The simplest example is the Batyrev formula for the quantum cohomology of topic Fano manifolds.

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