Towards a flat space Carrollian hologram from AdS₄/CFT₃

Finding a concrete example holography in four dimensional asymptotically flat space is an important open problem. A natural strategy is to take the flat space limit of the celebrated AdS₄/CFT₃ correspondence, which relates M-theory in AdS₄×S⁷ to a certain superconformal Chern-Simons-matter theory known as the ABJM theory. In this limit, the boundary of AdS₄ becomes null infinity and the ABJM theory should exhibit an emergent superconformal Carrollian symmetry. We investigate this possibility by matching the Carrollian limit of ABJM correlators with four-dimensional supergravity amplitudes that arise from taking the flat space limit of AdS₄×S⁷ and reducing along the S⁷. We also present a general analysis of three-dimensional superconformal Carrollian symmetry.