Time Symmetric Electrodynamics in Friedmann Universes

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Abstract
The time symmetric electrodynamics is discussed in the background of conformally flat cosmological models, in particular the Robertson-Walker models with k = ±1. It is shown that the Friedmann models with k = –1 behave in the same way as the Einstein–de Sitter model in giving self-consistent advanced (and not retarded) solutions of Maxwell's equations. The universes with k = + 1 give both the advanced and retarded solutions as self-consistent. It thus appears that a direct connection between the cosmological and electrodynamic arrows of time cannot be established in any Friedmann model. Continuous creation appears to be both necessary and sufficient to establish such a connection.

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