An alternative formulation of classical electromagnetic duality
arXiv:hep-th/0009116 · doi:10.1142/S0217732301004728
Abstract
By introducing a doublet of electromagnetic four dimensional vector potentials, we set up a manifestly Lorentz covariant and SO(2) duality invariant classical field theory of electric and magnetic charges. In our formulation one does not need to introduce the concept of Dirac string.
14 pages, no figures, Latex, minor corrections, references and acknowledgements added