We show that a 3D sourced conformal Carrollian field theory has the right kinematic
properties to holographically describe gravity in 4D asymptotically flat spacetime. The …

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 …

A bstract The isomorphism between the (extended) BMS 4 algebra and the 1+ 2D Carrollian
conformal algebra hints towards a co-dimension one formalism of flat holography with the …

A bstract Carrollian Conformal Field Theories (CFTs) have been proposed as co-dimension
one holographic duals to asymptotically flat spacetimes as opposed to Celestial CFTs which …

A bstract The Carroll algebra is constructed as the c→ 0 limit of the Poincare algebra and is
associated to symmetries on generic null surfaces. In this paper, we begin investigations of …

These lecture notes are intended for starting PhD students in theoretical physics who have a
working knowledge of General Relativity. The four topics covered are: Surface charges as …

A bstract We study two-dimensional celestial conformal field theory describing four-
dimensional\(\mathcal {N}\)= 1 supergravity/Yang-Mills systems and show that the …

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 We compare and contrast the two approaches of holography in asymptotically flat
spacetimes, viz. the co-dimension two Celestial approach based on the Mellin …