BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Roland Bittleston (Perimeter Institute) DTSTART:20230616T003000Z DTEND:20230616T013000Z DTSTAMP:20260423T010621Z UID:nmps/2 DESCRIPTION:Title: Cla ssical and Quantum Integrability in Self-Dual Gravity\nby Roland Bittl eston (Perimeter Institute) as part of Nagoya Math-Phys Seminar\n\n\nAbstr act\nThis talk will concentrate on an intriguing example of a 4d integrabl e theory: self-dual gravity. I will explain how its classical integrabilit y is realised in the existence of an infinite dimensional hidden symmetry algebra\, or celestial chiral algebra. This governs the universal holomorp hic surface defect which can couple to the twistor uplift of self-dual gra vity. At the quantum level\, this twistor uplift is anomalous and the quan tum corrected chiral algebra fails to be associative. I will present a num ber of methods of cancelling the anomaly\, leading to consistent quantum c orrected hidden symmetry algebras. Finally\, I will explore how this story is modified on one of the simplest non-trivial examples of a self-dual Ri cci flat background: the Eguchi-Hanson gravitational instanton.\n\nThis ta lk is based on collaborations with Simon Heuveline\, Atul Sharma and David Skinner.\n LOCATION:https://researchseminars.org/talk/nmps/2/ END:VEVENT END:VCALENDAR