Rayleigh-Ritz Variation Method and Connected-Moments Polynomial Approach

被引：7
|
作者：
Fernandez, Francisco M. [1 ]
机构：
[1] UNLP, CCT La Plata CONICET, INIFTA, Div Quim Teor, RA-1900 La Plata, Argentina
来源：
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY | 2009年 / 109卷 / 04期
关键词：
Rayleigh-Ritz variation method; connected-moments method; connected-moments polynomial approach; eigenvalues; Krylov space; GROUND-STATE ENERGY; T-EXPANSION; SYSTEMS; APPROXIMATIONS; HAMILTONIANS; EIGENVALUES; TOOL;
D O I：
10.1002/qua.21854
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：
We show that the connected-moments polynomial approach proposed recently is equivalent to the well known Rayleigh-Ritz variation method in the Krylov space. We compare the latter with one of the original connected-moments methods by means of a numerical test on an anharmonic oscillator. (C) 2008 Wiley Periodicals, Inc. Int J Quantum Chem 109: 717-719, 2009
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页码：717 / 719
页数：3
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