Enumeration of many-body skeleton diagrams |
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Authors: | L G Molinari N Manini |
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Institution: | (1) Dipartimento di Fisica dell'Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy and European Theoretical Spectroscopy Facility (E.T.S.F.), Milan node, Italy;(2) I.N.F.N. Sezione di Milano, Milano, Italy;(3) INFM - CNR, Unità di Milano, Milano, Italy |
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Abstract: | The many-body dynamics of interacting electrons in condensed matter and
quantum chemistry is often studied at the quasiparticle level, where the
perturbative diagrammatic series is partially resummed.
Based on Hedin's equations for self-energy, polarization, propagator,
effective potential, and vertex function,
dressed (skeleton) Feynman diagrams are enumerated.
Such diagram counts provide useful simple checks for extensions of the
theory for future realistic simulations. |
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Keywords: | 71 10 -w Theories and models of many-electron systems 24 10 Cn Many-body theory 11 10 Gh Renormalization |
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