No-birefringence conditions for spacetime
classification
✦ hep-th
gr-qc
keywords
conditionsapproachaxiomaticbirefringenceclassicalconecovariantderive
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Within the axiomatic premetric approach to classical electrodynamics, we derive under which covariant conditions the quartic Fresnel surface represents a unique light cone without birefringence in vacuum.
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