Approximations to the QED Fermion Green's Function in a Constant External Field
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
An exact representation of the causal QED fermion Green's function, in an arbritrary external electromagnetic field, derived by Fried, Gabellini and McKellar, and which naturally allows for non-perturbative approximations, is here used to calculate non-perturbative approximations to the Green's function in the simple case of a constant external field. Schwinger's famous exact result is obtained as the limit as the order of the approximation approaches infinity.
Keywords
Cite
@article{arxiv.hep-ph/0210226,
title = {Approximations to the QED Fermion Green's Function in a Constant External Field},
author = {S. K. J. Daniel and B. H. J. McKellar},
journal= {arXiv preprint arXiv:hep-ph/0210226},
year = {2009}
}
Comments
Revtex, 13pages, no figures