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Potentials and fields of a charge set suddenly from rest into uniform motion

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arxiv 2311.17652 v2 pith:ZGEPP3RJ submitted 2023-11-29 physics.class-ph

classification physics.class-ph
keywords potentialscalculatedchargecoulomb-gaugefieldsgaugelorenz-gaugemodified
verification ladder T0 review T1 audit T2 compute T3 formal
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The fact that electromagnetic effects propagate at the speed of light suggests how the Lorenz-gauge scalar and vector potentials of a uniformly moving point charge must be modified when the charge was initially at rest and then set suddenly into uniform motion. The modified potentials are shown to satisfy the requisite inhomogeneous wave equations. The gauge function of the transformation of these potentials to the Coulomb gauge is calculated in closed form. It is validated by confirming that the Coulomb-gauge vector potential that is calculated using it yields together with the Coulomb-gauge scalar potential the same electric and magnetic fields as those calculated with the Lorenz-gauge potentials.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Novel distributional Laplacians and a Coulomb-gauge problem

    physics.class-ph 2025-08 conditional novelty 5.0 of 10

    New distributional Laplacian identities for arsinh[a(z-b)/s] and ln[a(z-b)+sqrt(s^2+a^2(z-b)^2)] are derived and applied to solve the Coulomb-gauge Poisson equation for a uniformly moving charge.

  2. Direct, analytic solution for the electromagnetic vector potential in any gauge

    physics.class-ph 2025-07 conditional novelty 3.0 of 10

    The vector potential in any gauge is expressed as the retarded potential plus a gradient built from the scalar potential, which reduces to the known gauge transformation from the Lorenz gauge.

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