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Hamiltonian birefringence and Born-Infeld limits

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Abstract: Using Hamiltonian methods, we fnd six relativistic theories of nonlinear electrodynamics for which plane wave perturbations about a constant uniform background are not birefringent. All have the same conformal strong-feld limit to Bialynicki-Birula (BB) electrodynamics, but only four avoid superluminal propagation: Born-Infeld (BI), its non-conformal “extreme” limits (electric and magnetic) and the conformal BB limit. The quadratic dispersion relation of BI is shown to degenerate in the extreme limits to a pair of linear relations, which become identical in the BB limit.

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Journal of High Energy Physics, 2024, vol. 2024, num.186

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Hamiltonian birefringence and Born-Infeld limits