The response functions for the extended second and third random phase approximation are compared. A second-order perturbation calculation shows that the first-order amplitude for the direct 3p3h (three-particle–three-hole) excitation from the ground state cancels with those that are engendered by the 1p1h-3p3h coupling. As a consequence nonvanishing 3p3h effects to the 1p1h response involve off energy shell renormalization only. On shell 3p3h processes are absent.
Información general
Fecha de publicación:1 de abril de 1994
Idioma del documento:Inglés
Revista:Physical Review C; vol. 49, no. 4
Institución de origen:Facultad de Ciencias Exactas
Otros Identificadores:arXiv:nucl-th/9401013pmid:9969425
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