The Quantum Action Principle in the framework of Causal Perturbation Theory
arXiv:0801.1408 · doi:10.1007/978-3-7643-8736-5_11
Abstract
In perturbative quantum field theory the maintenance of classical symmetries is quite often investigated by means of algebraic renormalization, which is based on the Quantum Action Principle. We formulate and prove this principle in a new framework, in causal perturbation theory with localized interactions. Throughout this work a universal formulation of symmetries is used: the Master Ward Identity.
20 pages. Contribution to the Conference on 'Recent Developments in Quantum Field Theory' held from July 20 to July 22, 2007 at the Max Planck Institute for Mathematics in the Sciences, Leipzig/Germany