142 citations · 898 across the 29 of their papers we have counts for
31 papers
Quasinormal modes on Kerr spacetimes
Dejan Gajic, Claude M. Warnick
We introduce a rigorous framework for defining quasinormal modes on stationary, asymptotically flat spacetimes as isolated eigenvalues of the infinitesimal generator of time transl…
Quasinormal modes of Reissner-Nordström-AdS: the approach to extremality
Filip Ficek, Claude Warnick
We consider the quasinormal spectrum of scalar and axial perturbations of the Reissner-Nordström-AdS black hole as the horizon approaches extremality. By considering a foliation of…
Effective field theory and classical equations of motion
Harvey S. Reall, Claude M. Warnick
Given a theory containing both heavy and light fields (the UV theory), a standard procedure is to integrate out the heavy field to obtain an effective field theory (EFT) for the li…
A model problem for quasinormal ringdown on asymptotically flat or extremal black holes
Dejan Gajic, Claude Warnick
We consider a wave equation with a potential on the half-line as a model problem for wave propagation close to an extremal horizon, or the asymptotically flat end of a black hole s…
Quasinormal modes in extremal Reissner-Nordström spacetimes
Dejan Gajic, Claude Warnick
We present a new framework for characterizing quasinormal modes (QNMs) or resonant states for the wave equation on asymptotically flat spacetimes, applied to the setting of extrema…
Stability of the Toroidal AdS Schwarzschild Solution in the Einstein--Klein-Gordon System
Jake Dunn, Claude Warnick
We consider the stability of the toroidal AdS-Schwarzshild black holes as solutions of the Einstein--Klein-Gordon system, with Dirichlet or Neumann boundary conditions for the scal…