241 citations · 704 across the 43 of their papers we have counts for
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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…
Self-dual gravity in de Sitter space: lightcone ansatz and static-patch scattering
Yasha Neiman
Using Krasnov's formulation of General Relativity (GR), we develop a lightcone ansatz for self-dual gravity (along with linearized anti-self-dual perturbations) in the Poincare pat…
A look at area Regge calculus
Yasha Neiman
Area Regge calculus is a candidate theory of simplicial gravity, based on the Regge action with triangle areas as the dynamical variables. It is characterized by metric discontinui…
Polyhedra in spacetime from null vectors
Yasha Neiman
We consider convex spacelike polyhedra oriented in Minkowski space. These are the classical analogues of spinfoam intertwiners. We point out a parametrization of these shapes using…