Abstract
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 (SEC). This has implications for gravitational applications, such as regular black holes supported by NLED matter. For self-dual NLED theories, weak-field causality alone implies both the DEC and SEC, as we illustrate with Born-Infeld and ModMax electrodynamics.
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Acknowledgments
PKT has been partially supported by STFC consolidated grant ST/T000694/1. JGR acknowledges financial support from grants 2021-SGR-249 (Generalitat de Catalunya) and MINECO PID2019-105614GB-C21.
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Russo, J.G., Townsend, P.K. Causality and energy conditions in nonlinear electrodynamics. J. High Energ. Phys. 2024, 191 (2024). https://doi.org/10.1007/JHEP06(2024)191
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DOI: https://doi.org/10.1007/JHEP06(2024)191