BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ingo Runkel (University of Hamburg) DTSTART:20250423T090000Z DTEND:20250423T100000Z DTSTAMP:20260423T005827Z UID:TQFT/137 DESCRIPTION:Title: T opological symmetries and their gaugings in 2d CFT and 3d TFT\nby Ingo Runkel (University of Hamburg) as part of Topological Quantum Field Theor y Club (IST\, Lisbon)\n\n\nAbstract\nThe study of topological defects in q uantum field theory has seen a wealth of activity recently leading to man y interesting insights\, for example the explicit realisation of non-inver tible topological defects in higher dimensional QFTs via the gauging of hi gher form symmetries\, or the description of the higher algebraic structur es inherent in these topological defects. In this talk\, I would like to f ocus on low-dimensional examples\, where such defects and their properties have been investigated for some time already. I would like to exhibit som e of the properties of topological defects in two-dimensional conformal field theory and in three-dimensional topological field theory\, and sho w some of the structural insights into 2d CFT and 3d TFT one can gain with the help of defects. In this way\, the well-understood low-dimensional ca se might serve as a source of ideas and as a test case for higher dimensio nal constructions.\n LOCATION:https://researchseminars.org/talk/TQFT/137/ END:VEVENT END:VCALENDAR