On the physical interpretation of effective actions using Schwinger's formula
arXiv:hep-th/9404087 · doi:10.1007/BF00750068
Abstract
We show explicitly that Schwinger's formula for one-loop effective actions corresponds to the summation of energies associated with the zero-point oscillations of the fields. We begin with a formal proof, and after that we confirm it using a regularization prescription.
5 p., REVTEX, IF-UFRJ-94