QED in external fields, a functional point of view
classification
✦ hep-th
hep-ph
keywords
externalfunctionalequationfieldfieldsgraphsproperamplitude
read the original abstract
A functional partial differential equation is set for the proper graphs generating functional of QED in external electromagnetic fields. This equation leads to the evolution of the proper graphs with the external field amplitude and the external field gauge dependence of the complete fermion propagator and vertex is derived non-perturbativally.
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