Self-energies for the particle-hole propagator from Feynman-Dyson equations
Correlation-relaxation corrections to electronic transition energies are obtained through the self-energy fields for the particle-hole propagator. These objects are generated from Feynman-Dyson like equations within the scenario of the superoperator algebra. A Hartree-Fock reference state and a part...
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| Autores principales: | , , , |
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_01661280_v335_n1-3_p1_Bochicchio |
| Aporte de: |
| Sumario: | Correlation-relaxation corrections to electronic transition energies are obtained through the self-energy fields for the particle-hole propagator. These objects are generated from Feynman-Dyson like equations within the scenario of the superoperator algebra. A Hartree-Fock reference state and a partition of the operator space along with a particle conserving manifold are used to recast the lower order perturbative expressions for the self-energies. Correlated states are used to make explicit the appearance of higher order correction terms to the self-energy. It is explicitly shown that the present scheme leads to a proper classification of the order of the contribution from both the intrinsic interaction operator and the improved reference state. © 1995. |
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