2026-04-17T14:15:59Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1997492025-12-04T20:48:29Zcom_2072_1057col_2072_478822col_2072_478917
RECERCAT
author
Klein, D.J.
author
García Bach, Ma. de los Ángeles
2023-06-23T16:45:59Z2023-06-23T16:45:59Z19762023-06-23T16:45:59Z
Cluster expanded wavefunctions involving localized‐site states and only pair excitations between nearest neighbor sites are considered. In the case that the bonds connecting these nearest neighbor sites form a tree graph (without rings), exact matrix element formulas are obtained in terms of the inverse of a modified type of topological matrix associated with this tree graph. The treatment of some near‐tree cases, without any touching rings, is also discussed.
(c) American Institute of Physics (AIP), 1976 info:eu-repo/semantics/openAccess
Termodinàmica estadística
Teoria de grafs
Arbres
Statistical thermodynamics
Graph theory
Trees
Variational localized-site cluster expansions. II. Trees and near trees
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion