title: A convergent series for the QED effective action.
abstract: The one-loop effective action of QED obtained by Heisenberg and Euler and by Schwinger has been expressed by an asymptotic perturbative series which is divergent. In this Letter we present a nonperturbative but convergent series of the effective action. With the convergent series we establish the existence of the manifest electric-magnetic duality in the one-loop effective action of QED.
authors: Department of Physics, College of Natural Sciences, Seoul National University, Seoul, Korea.
authors: Y M
authors: YM
authors: Cho
authors: D G
authors: DG
authors: Pak