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- W3040155033 abstract "Lorentz- and $CPT$-violating models of electrodynamics with Chern-Simons terms are typically plagued by various sorts of instabilities. However, when the Chern-Simons term arises from a slow time variation in a pseudoscalar field with an axionlike electromagnetic coupling, the total energy of the theory is bounded below. We examine the behavior of such a theory, finding that in a systematic power series expansion of the magnetic and pseudoscalar fields, singularities appear in the field profiles. Some of the questionable behavior can be cured by taking a fully nonperturbative approach, but other problematic terms remain. This may be an indication that Cerenkov-like radiation will automatically carry away energy from a moving charge, preventing a charge from moving with uniform velocity over extended distances." @default.
- W3040155033 created "2020-07-10" @default.
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- W3040155033 date "2020-08-07" @default.
- W3040155033 modified "2023-09-27" @default.
- W3040155033 title "Problems with Lorentz violation originating from a cosmologically varying pseudoscalar field" @default.
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- W3040155033 doi "https://doi.org/10.1103/physrevd.102.035009" @default.
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