Perturbation expansion for bond orders and the commutator [H, S]

A perturbative expansion for Chirgwing and Coulson's and Löwdin's definitions of bond order is obtained, introducing explicitly the commutator [H, S]. Projection operator formalism is used in the development of the perturbation theory. Recurrence formulae are obtained for the corrections u...

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Detalles Bibliográficos
Autores principales: MacDowell, S.W., Giambiagi, M., de Giambiagi, M.S.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00296341_v35_n2_p410_MacDowell
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00296341_v35_n2_p410_MacDowell
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spelling todo:paper_00296341_v35_n2_p410_MacDowell2023-10-03T14:39:34Z Perturbation expansion for bond orders and the commutator [H, S] MacDowell, S.W. Giambiagi, M. de Giambiagi, M.S. A perturbative expansion for Chirgwing and Coulson's and Löwdin's definitions of bond order is obtained, introducing explicitly the commutator [H, S]. Projection operator formalism is used in the development of the perturbation theory. Recurrence formulae are obtained for the corrections up to any order. The relation between both definitions is given. © 1965 Società Italiana di Fisica. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00296341_v35_n2_p410_MacDowell
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A perturbative expansion for Chirgwing and Coulson's and Löwdin's definitions of bond order is obtained, introducing explicitly the commutator [H, S]. Projection operator formalism is used in the development of the perturbation theory. Recurrence formulae are obtained for the corrections up to any order. The relation between both definitions is given. © 1965 Società Italiana di Fisica.
format JOUR
author MacDowell, S.W.
Giambiagi, M.
de Giambiagi, M.S.
spellingShingle MacDowell, S.W.
Giambiagi, M.
de Giambiagi, M.S.
Perturbation expansion for bond orders and the commutator [H, S]
author_facet MacDowell, S.W.
Giambiagi, M.
de Giambiagi, M.S.
author_sort MacDowell, S.W.
title Perturbation expansion for bond orders and the commutator [H, S]
title_short Perturbation expansion for bond orders and the commutator [H, S]
title_full Perturbation expansion for bond orders and the commutator [H, S]
title_fullStr Perturbation expansion for bond orders and the commutator [H, S]
title_full_unstemmed Perturbation expansion for bond orders and the commutator [H, S]
title_sort perturbation expansion for bond orders and the commutator [h, s]
url http://hdl.handle.net/20.500.12110/paper_00296341_v35_n2_p410_MacDowell
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