A General-Model-Space Diagrammatic Perturbation Theory
作者： Gabriel Hose , Uzi Kaldor
DOI: 10.1088/0031-8949/21/3-4/019
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摘要: A diagrammatic many-body perturbation theory applicable to arbitrary model spaces is presented. The necessity of having a complete space (all possible occupancies the partially-filled shells) avoided. This requirement may be troublesome for systems with several well-spaced open shells, such as most atomic and molecular excited states, spans very broad energy range leaves out states within that range, leading poor or no convergence series. method presented here would particularly useful states. solution problem (He2 Σg+ states) demonstrated.
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