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Symmetries of electrodynamics with magnetic monopoles and the Hertz tensor
Phys. Rev. D 13, 2437 – Published 15 April, 1976
DOI: https://doi.org/10.1103/PhysRevD.13.2437
Abstract
We discuss discrete symmetries of the Maxwell equations with Dirac poles, written in manifestly duality-invariant form by means of the Hertz tensor. It is shown that in this framework the theory may give rise to parity and time-reversal violation only for systems without electric charges. When both electric and magnetic charges are present, the pseudovector character of the magnetic current—insuring parity and time-reversal invariance of the Maxwell equations—is a direct consequence of the vector transformation properties of the electric current.
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