Full self-consistency versus quasiparticle self-consistency in diagrammatic approaches: exactly solvable two-site Hubbard model
نویسندگان
چکیده
منابع مشابه
Full self-consistency versus quasiparticle self-consistency in diagrammatic approaches: exactly solvable two-site Hubbard model.
Self-consistent solutions of Hedin's equations (HE) for the two-site Hubbard model (HM) have been studied. They have been found for three-point vertices of increasing complexity (Γ = 1 (GW approximation), Γ1 from the first-order perturbation theory, and the exact vertex Γ(E)). Comparison is made between the cases when an additional quasiparticle (QP) approximation for Green's functions is appli...
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ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 2015
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/27/31/315603