Potentials of a uniformly moving point charge in the Coulomb gauge

Details Potentials of a uniformly moving point charge in the Coulomb gauge Potentials of a uniformly moving point charge in the Coulomb gauge

2003-07-24

arxiv.org/abs/physics/0307124v2

Eur. J. Phys. vol. 25, 351--360 (2004)

Physics

Classical Physics

To appear in European Journal of Physics. A delta-function identity for a second-order partial derivative of the Coulomb poten

Scientific paper

The Coulomb-gauge vector potential of a uniformly moving point charge is obtained by calculating the gauge function for the transformation between the Lorenz and Coulomb gauges. The expression obtained for the difference between the vector potentials in the two gauges is shown to satisfy a Poisson equation to which the inhomogeneous wave equation for this quantity can be reduced. The right-hand side of the Poisson equation involves an important but easily overlooked delta-function term that arises from a second-order partial derivative of the Coulomb potential of a point charge.

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