Phys. Rev. B 71, 113102 (2005) [3 pages]Hedin’s equations and enumeration of Feynman diagramsReceived 17 September 2004; published 17 March 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.71.113102
DOI:
10.1103/PhysRevB.71.113102
PACS:
71.10.−w, 24.10.Cn, 11.10.Gh
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