5 papers
Horizon Instability of the Extremal BTZ Black Hole
Samuel E. Gralla, Arun Ravishankar, Peter Zimmerman
We study real-time propagation of a massive scalar field on the extremal BTZ black hole spacetime, focusing on the Aretakis instability of the event horizon. We obtain a simple tim…
Teukolsky formalism for nonlinear Kerr perturbations
Stephen R. Green, Stefan Hollands, Peter Zimmerman
We develop a formalism to treat higher order (nonlinear) metric perturbations of the Kerr spacetime in a Teukolsky framework. We first show that solutions to the linearized Einstei…
Semi-local Quantum Criticality and the Instability of Extremal Planar Horizons
Samuel E. Gralla, Arun Ravishankar, Peter Zimmerman
We show that the Aretakis instability of compact extremal horizons persists in the planar case of interest to holography and discuss its connection with the emergence of "semi-loca…
Scaling and Universality in Extremal Black Hole Perturbations
Samuel E. Gralla, Peter Zimmerman
We show that the emergent near-horizon conformal symmetry of extremal black holes gives rise to universal behavior in perturbing fields, both near and far from the black hole horiz…
Plasma Waves and Jets from Moving Conductors
Samuel E. Gralla, Peter Zimmerman
We consider force-free plasma waves launched by the motion of conducting material through a magnetic field. We develop a spacetime-covariant formalism for perturbations of a unifor…