Flat Space/Carrollian Limit of AdS/CFT

by Romain Ruzziconi (Harvard University)

Thursday 15 Jan 2026, 15:00 → 16:30 Europe/Berlin

Note: unusual time. Online seminar.

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Carrollian holography provides a framework for flat space holography, proposing that gravity in four-dimensional asymptotically flat spacetime is dual to a Carrollian CFT in three dimensions living at null infinity. In this talk, I will present this framework and explain how massless scattering amplitudes in flat space can be re-expressed as Carrollian CFT correlators at the boundary, referred to as Carrollian amplitudes. I will then show that these correlators naturally arise from the Carrollian limit of holographic CFT correlators computed via AdS Witten diagrams, establishing a correspondence between the flat space limit in the bulk and the Carrollian limit at the boundary. This paves the way towards deriving flat space holography from the flat space/Carrollian limit of the AdS/CFT correspondence.