QUASI-DEGENERACY AND COUPLED-PAIR THEORIES

被引：41

作者：

ADAMS, BG

JANKOWSKI, K

PALDUS, J

机构：

[1] Quantum Theory Group, Department of Applied Mathematics, University of Waterloo, Waterloo

来源：

CHEMICAL PHYSICS LETTERS | 1979年 / 67卷 / 01期

关键词：

D O I：

10.1016/0009-2614(79)87124-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The source of differences between the exact and approximate coupled-pair methods is investigated for the Be ground state. We find that the discrepancy between the coupled-pair theory and its linear version is due to quasi-degeneracy effects. A very accurate CEPA-type approximation is also discussed. © 1979.

引用

页码：144 / 148

页数：5

共 27 条

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[J]. JOURNAL OF CHEMICAL PHYSICS, 1977, 67 (01) : 303 - 318

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