BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Luigi Alfonsi DTSTART:20200828T123000Z DTEND:20200828T133000Z DTSTAMP:20260423T021148Z UID:EGSS/15 DESCRIPTION:Title: Hi gher geometric aspects of global Double Field Theory\nby Luigi Alfonsi as part of Exceptional geometry seminar series\n\n\nAbstract\nHigher diff erential geometry is a generalization of differential geometry\, where ord inary geometric structures are replaced by their L∞-versions (such as L ∞groups and L∞algebras). This formalism let the concept of principal b undle be generalized to the one of "bundle gerbe". This geometric object c an be equipped with a connection\, whose parallel transport is defined on surfaces instead of on paths. This will be exactly the global formalizatio n of the Kalb-Ramond field. We can then say that bundle gerbes are for str ings what principal bundles are for gauge particles.\n\nDouble Field Theor y is often referred to as a generalization of Kaluza-Klein Theory that un ifies a metric and a Kalb-Ramond field\, instead of a gauge field. Can thi s statement be made geometrically precise? In this talk I will give a simp le introduction to higher differential geometry\, then I will explore the idea that DFT can be naturally globalized in this geometric formalism. Fin ally I will apply this construction to obtain some examples of T-duality.\ n LOCATION:https://researchseminars.org/talk/EGSS/15/ END:VEVENT END:VCALENDAR