BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:An infrared on-shell action in asymptotically flat spacetimes DTSTART:20241217T130000Z DTEND:20241217T150000Z DTSTAMP:20241213T164153Z UID:indico-event-1450462@indico.cern.ch DESCRIPTION:One of the main entries in the AdS/CFT dictionary is a relatio n between the bulk on-shell partition function with specified boundary con ditions and the generating function of correlation functions of primary op erators in the boundary CFT. In this talk\, I will show how to construct a similar relation for gravity in 4d asymptotically flat spacetimes. For si mplicity\, we will restrict to the leading infrared sector\, where a caref ul treatment of soft modes and their canonical partners leads to a non-van ishing on-shell action. I will show that this action localizes to a codime nsion-2 surface and coincides with the generating function of 2d CFT corre lators involving insertions of Kac-Moody currents. The latter were previou sly shown\, using effective field theory methods\, to reproduce the leadin g soft graviton theorems in 4d. I will conclude with comments on the impli cations of these results for the computation of soft charge fluctuations i n the vacuum. (Online Talk)\n\nhttps://indico.cern.ch/event/1450462/ LOCATION:CERN 4/3-006 - TH Conference Room URL:https://indico.cern.ch/event/1450462/ END:VEVENT END:VCALENDAR