A Carrollian Perspective on Celestial Holography
Laura Donnay, Adrien Fiorucci, Yannick Herfray, Romain Ruzziconi
We propose a holographic description of gravity in $4d$ asymptotically flat
spacetime in terms of a $3d$ sourced conformal Carrollian field theory. The
external sources encode the leaks of gravitational radiation at null infinity.
The Ward identities of this theory are shown to reproduce those of the $2d$
celestial CFT after relating Carrollian to celestial operators. This suggests a
new set of interplays between gravity in asymptotically flat spacetime, sourced
conformal Carrollian field theory and celestial CFT.