BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Lukas Müller (Perimeter Institute) DTSTART:20240207T170000Z DTEND:20240207T180000Z DTSTAMP:20260423T024751Z UID:TQFT/101 DESCRIPTION:Title: T opological defects form higher dagger categories\nby Lukas Müller (Pe rimeter Institute) as part of Topological Quantum Field Theory Club (IST\, Lisbon)\n\n\nAbstract\nRecently\, the study of higher categories of topol ogical defects in quantum field theory has gained significant attention du e to their connection to categorical symmetries. These higher categories e xhibit noteworthy additional structures\, depending upon the specific theo ries and defects under consideration. For instance\, in oriented 2-dimensi onal field theories\, they organize into a pivotal bicategory. Currently\, we lack a comprehensive framework to systematically describe these intric ate structures. In my talk I will argue that the theory of higher dagger c ategories provides such a framework. I will focus on defects within fully extended topological field theories. Except in low dimensions the picture proposed here is highly conjectural. The talk is partially based on joint work in progress with Bruce Bartlett\, Gio Ferrer\, Brett Hungar\, Theo Jo hnson-Freyd\, Cameron Krulewski\, Nivedita\, Dave Penneys\, David Reutter\ , Claudia Scheimbauer\, Luuk Stehouwer\, and Chetan Vuppulury.\n LOCATION:https://researchseminars.org/talk/TQFT/101/ END:VEVENT END:VCALENDAR