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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.

Hedin's equations and enumeration of Feynman diagrams / L. G. Molinari. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 71:11(2005), pp. 113102.113102-1-113102.113102-3.

Hedin's equations and enumeration of Feynman diagrams

L. G. Molinari
Primo
2005

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 GW approximation.
Fermion systems; many-body problems; Feynman diagrams; renormalization; vertex functions.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
2005
Article (author)
01 - Articolo su periodico
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/16771
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