Bücher von Ingvar Lindgren

Part II describes three methods for QED calculations, a) the standard S-matrix formulation, b) the Two-times Green's-function method, developed by the St Petersburg Atomic Theory group, and c) the Covariant-evolution operator (CEO) method, recently developed by the Gothenburg Atomic Theory group.

This comprehensive account of relativistic many-body perturbation theory covers both time-dependent and time-independent MBPT, and reviews standard techniques such as S-matrix and Green's functions as well as the new covariant-evolution-operator method.