BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Catherine Meusburger (University of Erlangen-Nuremberg) DTSTART:20221107T150000Z DTEND:20221107T160000Z DTSTAMP:20260423T021115Z UID:EQuAL/3 DESCRIPTION:Title: Tu raev-Viro-Barrett-Westbury invariants with defects\nby Catherine Meusb urger (University of Erlangen-Nuremberg) as part of European Quantum Algeb ra Lectures (EQuAL)\n\n\nAbstract\nTuraev-Viro-Barrett-Westbury state sum models are concrete constructions\nof TQFTs based on triangulated 3-manifo lds and spherical fusion\ncategories. Introducing defects in these models is of interest for\ndefect TQFTs and for applications in condensed matter physics.\n\nIn the talk we explain how to construct Turaev-Viro-Barrett-We stbury\nstate sums with defects in terms of generalised 6j symbols. Defect \nsurfaces are labeled with bimodule categories over spherical fusion\ncat egories\, defect lines and points form graphs on these surfaces and\nare l abeled with bimodule functors and bimodule natural transformations.\nWe sh ow that the resulting state sums are triangulation independent\,\ncompute examples and interpret them.\n\nBased on https://arxiv.org/abs/2205.06874\ n LOCATION:https://researchseminars.org/talk/EQuAL/3/ END:VEVENT END:VCALENDAR