Systematic vertex corrections through iterative solution of Hedin's equations beyond the GW approximation

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dc.creatorSchindlmayr, Arno
dc.creatorGodby, R. W.
dc.date1997-10-28
dc.date.accessioned2026-07-07T06:29:49Z
dc.date.available2026-07-07T06:29:49Z
dc.descriptionWe present a general procedure for obtaining progressively more accurate functional expressions for the electron self-energy by iterative solution of Hedin's coupled equations. The iterative process starting from Hartree theory, which gives rise to the GW approximation, is continued further, and an explicit formula for the vertex function from the second full cycle is given. Calculated excitation energies for a Hubbard Hamiltonian demonstrate the convergence of the iterative process and provide further strong justification for the GW approximation.
dc.description4 pages including 3 figures, RevTeX
dc.identifierhttps://arxiv.org/abs/cond-mat/9710295
dc.identifierhttp://arxiv.org/abs/cond-mat/9710295
dc.identifierPhys. Rev. Lett. 80, 1702 (1998).
dc.identifierdoi:10.1103/PhysRevLett.80.1702
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98172
dc.subjectMaterials Science
dc.titleSystematic vertex corrections through iterative solution of Hedin's equations beyond the GW approximation
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