2002/02/08 by Christian Brouder, Brouder, Christian · 1 citation
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.physics/0202025
21 pages, feynmf package
arxiv created 2002/02/08 · arxiv updated 2009/12/01
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.