- This event has passed.
Sujay Ashok (IMSc, Chennai)
1 Jul 2020 @ 3:00 PM - 5:00 PM
Zoom seminar: https://us02web.zoom.
Time: 4pm(Japan/Korea), 3pm(China), 12:30pm(India), 10am(Israel/Moscow), 9am(Berlin/Paris)
Title: Surface Defects from Fractional Branes
Abstract: We show that the Gukov-Witten monodromy defects of supersymmetric Yang-Mills theory can be realized in perturbative string theory by considering an orbifold background of the Kanno-Tachikawa type and placing stacks of fractional D3-branes whose world-volume partially extends along the orbifold directions. In particular, we show that turning on a constant background value for some scalar fields in the closed string twisted sectors induces a non-trivial profile for the gauge field and one of the complex scalars of the world-volume theory, and that this profile exactly matches the singular behavior that one expects for a Gukov-Witten surface defect in the N=4 supersymmetric gauge theory.