Hedin's equations and enumeration of Feynman's diagrams
Abstract
Description
Hedin's equations are solved perturbatively in zero dimension to count Feynman graphs for self-energy, polarization, propagator, effective potential and vertex function in a many-body theory of fermions with two-body interaction. Counting numbers are also obtained in the GW approximation.
Revised published version, 3 pages, no figures
Revised published version, 3 pages, no figures