Variational principle for the correction of the third order energy in perturbation theory

The variational method for the calculation of the third-order correction without using the correction function of the first order is suggested. ϵ 3 in 1/ Z expansions for two-electron atoms are calculated. The method of evaluating the lower bound for ϵ 3 is described.

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Bibliographic Details
Published in:Chemical physics letters 1969-09, Vol.4 (1), p.43-44
Main Authors: Dmitriev, Yu.Yu, Yuriev, M.S.
Format: Article
Language:English
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Summary:The variational method for the calculation of the third-order correction without using the correction function of the first order is suggested. ϵ 3 in 1/ Z expansions for two-electron atoms are calculated. The method of evaluating the lower bound for ϵ 3 is described.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(69)85030-X