An exact (3+1)-dimensional QED effective action
Oct, 1997Citations per year
Abstract:
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}.Note:
- 7 pages, Latex, no figures
- quantum electrodynamics
- fermion
- effective action
- perturbation theory: higher-order
- expansion: derivative
- asymptotic expansion
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