The Stueckelberg wave equation and the anomalous magnetic moment of the electron

The parametrized relativistic quantum mechanics of Stueckelberg (1942 Helv. Phys. Acta 15 23) represents time as an operator, and has been shown elsewhere to yield the recently observed phenomena of quantum interference in time, quantum diffraction in time and quantum entanglement in time. The Stueckelberg wave equation as extended to a spin-1/2 particle by Horwitz and Arshansky (1982 J. Phys. A: Math. Gen. 15 L659) is shown here to yield the electron g-factor g = 2 (1 + alpha/2 pi), to leading order in the renormalized fine structure constant alpha, in agreement with the quantum electrodynamics of Schwinger (1948 Phys. Rev. 73 416).