2 citations · 5 across the 13 of their papers we have counts for
5 papers · 1 filter
Obstructions to Minimal Regular Black Hole Cosmologies
Damien A. Easson
We derive an obstruction to Friedmann--Lemaître--Robertson--Walker (FLRW) daughter cosmologies from static, asymptotically flat regular black holes. The trapped region of such a pa…
Cauchy-horizon flux coefficients in the reduced Polyakov model
Damien A. Easson
We derive the leading Cauchy-horizon flux coefficient in the stationary reduced Polyakov sector of spherically symmetric charged black holes. For a nonextremal inner horizon with a…
Affine ANEC selects the closed FRW branch for geodesically complete cosmology
Nathan L. Burwig, Damien A. Easson
We study the relation between geodesic completeness, the averaged null energy condition (ANEC), and spatial curvature in Friedmann--Robertson--Walker (FRW) cosmology within classic…
Birkhoff rigidity from a covariant optical seed
D. A. Easson
We present a local seed-to--Kerr--Schild route to Birkhoff rigidity in four-dimensional spherical vacuum gravity. On the two-dimensional orbit space, the areal radius determine…
Isometries and the double copy
Damien A. Easson, Gabriel Herczeg, Tucker Manton +1
In the standard derivation of the Kerr-Schild double copy, the geodicity of the Kerr-Schild vector and the stationarity of the spacetime are presented as assumptions that are neces…