%0 Journal Article
%T An Exact QED_{3+1} Effective Action
%A Gerald Dunne
%A Theodore M. Hall
%J Physics
%D 1997
%I arXiv
%R 10.1016/S0370-2693(97)01429-9
%X We compute the exact QED_{3+1} effective action for fermions in the presence of a family of static but spatially inhomogeneous magnetic field profiles. An asymptotic expansion of this exact effective action yields an all-orders derivative expansion, the first terms of which agree with independent derivative expansion computations. These results generalize analogous earlier results by Cangemi et al in QED_{2+1}.
%U http://arxiv.org/abs/hep-th/9710062v1