Title

Effective-action expansion in perturbation theory

Document Type

Article

Publication Date

1-1-1985

Abstract

I present a systematic method for the development of the effective-action expansion in perturbation theory. The multiderivative terms beyond the effective potential can be evaluated in a direct and simple manner relying only on the familiar momentum space and Feynman propagator. I have used the self-coupled scalar field to explain the details of this new formulation. The effective-action expansion for this model in the one-loop approximation is evaluated up to the terms containing four derivatives. This method can be readily generalized to other models with spins and internal symmetries. © 1985 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

1222

Last Page

1225

This document is currently not available here.

Share

COinS