Abstract
A functional partial differential equation is set for the proper graphs generating functionals 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 nonperturbatively.
- Received 26 January 2001
DOI:https://doi.org/10.1103/PhysRevD.64.045011
©2001 American Physical Society