7 papers
Universal structure in the interactions of massless fields on the lightcone
Jin Kozaki, Yasha Neiman
We consider cubic interactions of massless fields of arbitrary spin in 4 spacetime dimensions, within the lightcone formalism. We extend two key results from flat to (Anti-)de Sitt…
Causality of higher-spin interactions on the (A)dS lightcone, with application to the static patch
Jin Kozaki, Julian Lang, Yasha Neiman
We study Higher-Spin Gravity in 4-dimensional (Anti-)de Sitter space, at leading order in the interactions (cubic vertices), in the AdS lightcone formalism developed by Metsaev. Us…
Theories of the gravity+gauge type in de Sitter space
Julian Lang, Yasha Neiman
We study theories of the "General Relativity + Yang-Mills" type in 4d spacetime with cosmological constant, focusing on formulations where the basic variables are connections and c…
Unified Lagrangians for gravity and gauge theory
Yasha Neiman
We present a new Lagrangian formulation of General Relativity with cosmological constant, coupled to Yang-Mills gauge theory. The formulation has a manifest color/kinematics-dual s…
Topology Change from Pointlike Sources
Yasha Neiman, David O'Connell
In this paper we study topology-changing spacetimes occurring from pointlike sources. Following an old idea of Penrose, we will opt for a non-Hausdorff model of topology change in…
N=2 supersymmetry in the twistor description of higher-spin holography
Julian Lang, Yasha Neiman
We study the holographic duality between higher-spin (HS) gravity in 4d and free vector models in 3d, with special attention to the role of N=2 supersymmetry (SUSY). For the type-A…