Hedin's equations and enumeration of Feynman's diagrams

Details Hedin's equations and enumeration of Feynman's diagrams Hedin's equations and enumeration of Feynman's diagrams

2004-01-26

arxiv.org/abs/cond-mat/0401500v2

Phys. Rev. B 71, 113102 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

Revised published version, 3 pages, no figures

Scientific paper

10.1103/PhysRevB.71.113102

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.

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