Revisiting the conformal invariance of Maxwell's equations in curved spacetime
arXiv:1905.09968 · doi:10.1007/s10714-019-2599-x
Abstract
We revisit the invariance of the curved spacetime Maxwell equations under conformal transformations. Contrary to standard literature, we include the discussion of the four-current, the wave equations for the four-potential and the field, and the behaviour of gauge conditions under the conformal transformation.