Perturbative QED in terms of gauge invariant fields |
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Authors: | O Steinmann |
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Institution: | Universität Bielefeld, Fakultät für Physik, D-4800 Bielefeld 1, West Germany |
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Abstract: | A formulation of QED using only gauge invariant fields acting on a physical state space is discussed. The fields are the electromagnetic tensor Fμν and a non-local electron field ψf depending on a quadruple {fμ} of auxiliary functions. The f-ambiguity is physically meaningful: the fμ contain information on the asymptotic configuration of the electromagnetic field accompanying charged particles. Equations of motion are introduced and solved perturbatively, in the sense that expressions for the Wightman functions of the theory are derived. No information on the commutation relations between the basic fields is needed. |
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