Abstract
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 approximation.
- Received 17 September 2004
DOI:https://doi.org/10.1103/PhysRevB.71.113102
©2005 American Physical Society