4 papers
Inverse Reconstruction of Causal Nonlinear Electrodynamics: Functional Families, Spectral Constraints, and Single-Horizon Black Holes
Ariel Guzmán, Mohsen Fathi, J. R. Villanueva
Nonlinear electrodynamics (NLED) admits many causal theories, so causality alone does not provide a unique selection principle. We formulate an inverse construction in which consti…
A causal magnetic black hole with finite self-energy
Mohsen Fathi, Ariel Guzmán, J. R. Villanueva
We construct a nonlinear electrodynamics (NLED) model for a static magnetic black hole. Rather than imposing a regular center, we require a Maxwell weak-field limit, finite magneti…
Constitutive birefringence and critical curves in the rotating García--Díaz black hole
Ariel Guzmán, Mohsen Fathi, J. R. Villanueva
We study high-frequency electromagnetic propagation in the rotating García--Díaz solution of Einstein gravity coupled to NLED. In this system, light is not governed only by the nul…
Quasinormal modes of a static black hole in nonlinear electrodynamics
Mohsen Fathi, Ariel Guzmán, J. R. Villanueva
We investigate the axial electromagnetic quasinormal modes of a static, asymptotically Anti--de Sitter (AdS) black hole sourced by a nonlinear electrodynamics model of Plebański ty…