An Exact QED3+1 Effective Action
Gerald Dunne, Theodore M. Hall
Abstract
We compute the exact QED3+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 QED2+1.
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