Algebraic and Enumerative Combinatorics Seminar - Karen Yeats

Thursday, October 5, 2023 2:00 pm - 2:00 pm EDT (GMT -04:00)

Title: Diagrammatic boundary calculus for Wilson loop diagrams

Speaker: Karen Yeats
Affiliation: University of Waterloo
Location: MC 6029

There will be a pre-seminar presenting relevant background at the beginning graduate level starting at 1pm.

Abstract: This talk is about a different part of the quantum field theory story than I usually talk about.  Wilson loop diagrams can be used to index amplitudes in a theory known as N=4 SYM.  Suitably nice Wilson loop diagrams are also associated to positroids.  For both mathematical and physical reasons it would be nice to have a diagrammatic understanding of the boundaries of the positroid cells of all co-dimensions.  While we do not yet have a full understanding, we can build many boundaries with certain diagrammatic moves.

Joint work with Susama Agarwala and Colleen Delaney.