Madalena Lemos - Surface defects in 4d superconformal theories and chiral algebras

When: Thursday, January 23, 2020, 2:00 PM - 3:00 PM
Where:

Speaker: Madalena Lemos

We study symmetry constraints on BPS surface defects in four-dimensional superconformal field theories, showing how supersymmetry imposes relations on anomaly coefficients.

Turning to dynamics, we analyze a protected subsector of N=(2,2) surface defects that is captured by a two-dimensional chiral algebra. We discuss how to compute observables of interacting defects from the chiral algebra, including the aforementioned anomaly coefficients.