A convergent series for the QED effective action.
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.
Cho
Y M
YM
Department of Physics, College of Natural Sciences, Seoul National University, Seoul, Korea.
Pak
D G
DG