QCI and related CC approaches: A retrospection

摘要

The relationship between standard single-reference coupled-cluster (CC) and quadratic configurations interaction (QCI) methods is reviewed from the viewpoint of both past and recent developments in the methodology of post-Hartree-Fock approaches to the many-electron correlation problem, emphasising their advantages and shortcomings on the basis of many-body perturbation theory (MBPT) analysis, the required computational effort, and their practical exploitations.