278 citations · 382 across the 10 of their papers we have counts for
11 papers
Black holes and causal nonlinear electrodynamics
Jorge G. Russo, Paul K. Townsend
For generic theories of nonlinear electrodynamics (NLED) we investigate the implications of (a)causality on spherically-symmetric solutions of the Einstein-NLED equations that are…
Simplified self-dual electrodynamics
Jorge G. Russo, Paul K. Townsend
We present a new formulation of self-dual nonlinear electrodynamics in which interactions are determined by an auxiliary-field potential, with causality ensuring a unique solution…
Causal chiral 2-form electrodynamics
Jorge G. Russo, Paul K. Townsend
Generic nonlinear theories of chiral 2-form electrodynamics allow superluminal propagation in some stationary homogeneous backgrounds and are therefore acausal. We find a simple pa…
Dualities of Self-Dual Nonlinear Electrodynamics
Jorge G. Russo, Paul K. Townsend
For any causal nonlinear electrodynamics theory that is "self-dual" (electromagnetic -duality invariant), the Legendre-dual pair of Lagrangian and Hamiltonian densities $\{\m…
Causality and Energy Conditions in Nonlinear Electrodynamics
Jorge G. Russo, Paul K. Townsend
For the general theory of nonlinear electrodynamics (NLED), we prove that causality implies both the Dominant Energy Condition (DEC) and, surprisingly, the Strong Energy Condition…
Causal Self-Dual Electrodynamics
Jorge G. Russo, Paul K. Townsend
Many theories of nonlinear electrodynamics (NLED) that have been proposed in physical contexts involving strong fields are causal for weak fields but acausal for strong fields. We…