PIRSA:26030087

Integrable Sigma-Model Boundaries and D-Branes

Driezen, S. (2026). Integrable Sigma-Model Boundaries and D-Branes. Perimeter Institute. https://pirsa.org/26030087

Driezen, Sibylle. Integrable Sigma-Model Boundaries and D-Branes. Perimeter Institute, Mar. 27, 2026, https://pirsa.org/26030087 

          @misc{ pirsa_PIRSA:26030087,
            doi = {10.48660/26030087},
            url = {https://pirsa.org/26030087},
            author = {Driezen, Sibylle},
            keywords = {Mathematical physics},
            language = {en},
            title = {Integrable Sigma-Model Boundaries and D-Branes},
            publisher = {Perimeter Institute},
            year = {2026},
            month = {mar},
            note = {PIRSA:26030087 see, \url{https://pirsa.org}}
          }

Sibylle Driezen ETH Zurich

Talk numberPIRSA:26030087
DOI10.48660/26030087
Collection
Talk Type Scientific Series
Subject

Abstract

Identifying which boundary conditions preserve integrability in two-dimensional sigma-models is a basic structural question, relevant from open string dynamics to impurity problems.  I will discuss a simple analytic approach that determines integrable boundary conditions through the divisor structure of the Lax connection, giving a generalisation of previous constructions.  As an application, I will treat open strings on AdS3 x S3 with mixed NSNS-RR flux, where the standard approaches cease to work at generic flux, and show how the background supports integrable D-branes that wrap twisted conjugacy classes in SL(2,R)xSU(2).  If time permits I will discuss this example and construction from the point of view of 4d Chern-Simons theory.