Events List

DateEvent TypeSpeaker
05/01/2025Special SeminarLyman Page [ + ]
05/01/2025Physics Dept ColloquiumLyman Page [ + ]
05/02/2025Hep-Th Discussion SessionCalkins [ + ]
05/05/2025CCPP Brown BagWenzer Qin [ + ]
05/06/2025Astro SeminarTetyana Pitik [ + ]
05/07/2025HEP Journal Club [ + ]
05/07/2025HEP SeminarHowie Haber [ + ]
05/09/2025Special SeminarVladimir Rosenhaus [ + ]
05/09/2025Hep-Th Discussion SessionCalkins [ + ]
05/14/2025Informal HEP TalkSebastian Ellis [ + ]
05/14/2025HEP Journal Club [ + ]
05/14/2025Informal HEP TalkZach Weiner [ + ]
05/16/2025Informal HEP TalkSoichiro Shimamori [ -- ]

Title: Boundary Scattering and Non-invertible Symmetries in 1+1 Dimensions
Abstract: Recent studies by Copetti, Córdova and Komatsu have revealed that when non-invertible symmetries are spontaneously broken, the conventional crossing relation of the S-matrix is modified by the effects of the corresponding topological quantum field theory (TQFT). We extend these considerations to (1+1)-dimensional quantum field theories (QFTs) with boundaries. In the presence of a boundary, one can define not only the bulk S-matrix but also the boundary S-matrix, which is subject to a consistency condition known as the boundary crossing relation. We show that when the boundary is weakly-symmetric under the non-invertible symmetry, the conventional boundary crossing relation also receives a modification due to the TQFT effects. As a concrete example of the boundary scattering, we analyze kink scattering in the gapped theory obtained from the Φ(1,3)-deformation of a minimal model. We explicitly construct the boundary S-matrix that satisfies the Ward-Takahashi identities associated with non-invertible symmetries. This talk is based on the collaboration with Satoshi Yamaguchi. (1:00 PM - 2:00 PM, 726 Broadway, 940, CCPP Seminar)
09/11/2025Physics Dept ColloquiumWendy Freeman [ + ]