Abstract
The “absorber theory” of Wheeler and Feynman is supposed to justify the use of retarded potentials in ordinary electromagnetic calculations despite a fundamentally time symmetric interaction. We restate the thesis of absorber theory as follows: here exist causal solutions of time symmetric electrodynamics. In our formulation, absorption need only take place in one direction of time (the future) rather than both, as seems to be required by Wheeler and Feynman. Even with complete absorption, however, the effects of advanced interactions are not entirely eliminated and a residual field may introduce a degree of indeterminacy into particle trajectories obtained using retarded potentials alone.
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Schulman, L.S. Formulation and justification of the Wheeler-Feynman absorber theory. Found Phys 10, 841–853 (1980). https://doi.org/10.1007/BF00708683
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DOI: https://doi.org/10.1007/BF00708683