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jtbell
#10
Aug10-11, 11:43 PM
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If you're prepared to move beyond classical electrodynamics to quantum electrodynamics, postulating that particle (e.g. electron) fields have local U(1) gauge symmetry requires the existence of a "new" field that has exactly the properties of the electromagnetic (photon) field. See for example

http://en.wikipedia.org/wiki/Gauge_t...lectrodynamics

The Quantum Physics forum here is probably a better place to pursue this train of thought.