2 papers
gr-qc2026
Stability of the Minkowski spacetime in Newman-Unti gauge
Jonathan Luk, Sung-Jin Oh, Claude Warnick
We prove small-data global stability of the Minkowski solution to Einstein's equations in a centre-normalised outgoing null-geodesic gauge. Our scheme involves first using the $r^p…
gr-qc2024
(In)stability of de Sitter Quasinormal Mode spectra
Claude Warnick
We consider how the quasinormal spectrum for the conformal wave operator on the static patch of de Sitter changes in response to the addition of a small potential. Since the quasin…