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Abstract:

An alternative theoretical approach to the polarization propagator based on a new finite expansion of a finite-dimensional matrix is presented. The general equations for such an expansion are derived and the validity conditions stated. This method is used to accomplish an approximate scheme for the self-energy of the particle-hole propagator within the superoperator formalism. Within this scheme each contribution includes corrections to infinite order in electronic interaction and so describes collective effects in a natural way. Individual contributions can be interpreted as describing the propagation of the interaction through a particular subset of electronic excitations. Comparison with other known approximation levels, such as the random-phase approximation, is also analyzed.

Registro:

Documento: Artículo
Título:Finite expansion of the inverse matrix in the polarization propagator method
Autor:Cavasotto, C.N.
Filiación:Departamento de Física, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina
Department of Molecular Biology, TPC-28 The Scripps Res. Institute, 10550 North Torrey Pines Road, San Diego, CA 92037, United States
Palabras clave:Inverse matrix; Particle-hole propagator; Polarization propagator; Self-energy
Año:2000
Volumen:104
Número:6
Página de inicio:491
Página de fin:498
DOI: http://dx.doi.org/10.1007/s002140000176
Título revista:Theoretical Chemistry Accounts
Título revista abreviado:Theor. Chem. Acc.
ISSN:1432881X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1432881X_v104_n6_p491_Cavasotto

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Citas:

---------- APA ----------
(2000) . Finite expansion of the inverse matrix in the polarization propagator method. Theoretical Chemistry Accounts, 104(6), 491-498.
http://dx.doi.org/10.1007/s002140000176
---------- CHICAGO ----------
Cavasotto, C.N. "Finite expansion of the inverse matrix in the polarization propagator method" . Theoretical Chemistry Accounts 104, no. 6 (2000) : 491-498.
http://dx.doi.org/10.1007/s002140000176
---------- MLA ----------
Cavasotto, C.N. "Finite expansion of the inverse matrix in the polarization propagator method" . Theoretical Chemistry Accounts, vol. 104, no. 6, 2000, pp. 491-498.
http://dx.doi.org/10.1007/s002140000176
---------- VANCOUVER ----------
Cavasotto, C.N. Finite expansion of the inverse matrix in the polarization propagator method. Theor. Chem. Acc. 2000;104(6):491-498.
http://dx.doi.org/10.1007/s002140000176