3 papers
gr-qc2025
First-Order Viscous Relativistic Hydrodynamics on the Two-Sphere
Lennox S. Keeble, Frans Pretorius
A few years ago, Bemfica, Disconzi, Noronha, and Kovtun (BDNK) formulated the first causal, stable, strongly hyperbolic, and locally well-posed theory of first-order viscous relati…
gr-qc2025
Accumulation of Charge on an Extremal Black Hole's Event Horizon
Zachary Gelles, Frans Pretorius
We numerically analyze the behavior of a charged scalar field on a fixed extremal Reissner-Nordström background. We find an extension of the Aretakis instability characterized by a…
gr-qc2024
On turbulence for spacetimes with stable trapping
Gabriele Benomio, Alejandro Cárdenas-Avendaño, Frans Pretorius +1
Motivated by understanding the nonlinear gravitational dynamics of spacetimes admitting stably trapped null geodesics, such as ultracompact objects and black string solutions to ge…