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arxiv: 1011.4258 · v5 · submitted 2010-11-18 · ✦ hep-th

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Consistency of isotropic modified Maxwell theory: Microcausality and unitarity

F.R. Klinkhamer , M. Schreck
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classification ✦ hep-th
keywords theoryisotropicmaxwellmodifiedlorentz-violatingmicrocausalityparameterstandard
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The Lorentz-violating isotropic modified Maxwell theory minimally coupled to standard Dirac theory is characterized by a single real dimensionless parameter which is taken to vanish for the case of the standard (Lorentz-invariant) theory. A finite domain of positive and negative values of this Lorentz-violating parameter is determined, in which microcausality and unitarity hold. The main focus of this article is on isotropic modified Maxwell theory, but similar results for two anisotropic nonbirefringent cases are presented in the appendices.

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  1. Crystallography, Lorentz violation, and the Standard-Model Extension

    cond-mat.mes-hall 2026-04 unverdicted novelty 6.0

    Crystal point groups parametrize SME Lorentz-violating coefficients in electromagnetic media, turning birefringent and multiferroic crystals into analogs for high-energy symmetry violations.