We review the role that infinite-dimensional symmetries arising at the boundary of
asymptotically flat spacetimes play in the context of the celestial holography program. Once …

Recent attempts at the construction of holography for asymptotically flat spacetime have
taken two different routes. Celestial holography, involving a two dimensional (2D) conformal …

Gravity in 4 d asymptotically flat spacetime constitutes the archetypal example of a
gravitational system with leaky boundary conditions. Pursuing our previous analysis of …

We show that self-dual gravity in Euclidean four-dimensional anti–de Sitter space (AdS 4)
can be described by a scalar field with a cubic interaction written in terms of a deformed …

A bstract We study celestial chiral algebras appearing in celestial holography, using the light-
cone gauge formulation of self-dual Yang-Mills theory and self-dual gravity, and explore also …

The Celestial Holography program encompasses recent efforts to understand the flat space
hologram in terms of a CFT living on the celestial sphere. A key development instigating …

A bstract Carrollian holography aims to express gravity in four-dimensional asymptotically
flat spacetime in terms of a dual three-dimensional Carrollian CFT living at null infinity …

A bstract Carrollian conformal field theories (carrollian CFTs) are natural field theories on
null infinity of an asymptotically flat spacetime or, more generally, geometries with conformal …

A bstract We demonstrate that the one-loop exact subleading soft graviton theorem
automatically follows from conservation of the BMS charges, provided that the hard and soft …

A bstract We explore the celestial holography proposal for non-trivial asymptotically flat
backgrounds including the Coulomb field of a static and spinning point charge, their …