Energy-momentum conservation in pre-metric electrodynamics with magnetic charges

Details Energy-momentum conservation in pre-metric electrodynamics with magnetic charges Energy-momentum conservation in pre-metric electrodynamics with magnetic charges

2004-01-13

arxiv.org/abs/math-ph/0401028v2

J.Phys. A37 (2004) 7163-7168

Physics

Mathematical Physics

8 pages, 1 fugure

Scientific paper

10.1088/0305-4470/37/28/007

A necessary and sufficient condition for energy-momentum conservation is proved within a topological, pre-metric approach to classical electrodynamics including magnetic as well as electric charges. The extended Lorentz force, consisting of mutual actions by F=(E, B) on the electric current and G=(H, D) on the magnetic current, can be derived from an energy-momentum "potential" if and only if the constitutive relation G=G(F) satisfies a certain vanishing condition. The electric-magnetic reciprocity introduced by Hehl and Obukhov is seen to define a complex structure on the tensor product of 2-form pairs (F,G) which is independent of but consistent with the Hodge star operator defined by any Lorentzian metric. Contrary to a recent claim in the literature, it does not define a complex structure on the space of 2-forms itself.

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