Renormalization of QED in an external field

Details Renormalization of QED in an external field Renormalization of QED in an external field

2002-02-08

arxiv.org/abs/physics/0202025v1

Physics

Atomic Physics

21 pages, feynmf package

Scientific paper

The Schwinger equations of QED are rewritten in three different ways as integral equations involving functional derivatives, which are called weak field, strong field, and SCF quantum electrodynamics. The perturbative solutions of these equations are given in terms of appropriate Feynman diagrams. The Green function that is used as an electron propagator in each case is discussed in detail. The general renormalization rules for each of the three equations are provided both in a non perturbative way (Dyson relations) and for Feynman diagrams.

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