4.4 Article

Alternative formulation of explicitly correlated third-order Moller-Plesset perturbation theory

期刊

MOLECULAR PHYSICS
卷 111, 期 16-17, 页码 2516-2522

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/00268976.2013.793846

关键词

F12 cusp conditions; MP3-F12; rational generator; SP ansatz

资金

  1. Japan Society for the Promotion of Science (JSPS) [00270471]
  2. Strategic Programs for Innovative Research (SPIRE), MEXT
  3. Computational Materials Science Initiative (CMSI), Japan
  4. Grants-in-Aid for Scientific Research [23350009] Funding Source: KAKEN

向作者/读者索取更多资源

The second-order wave operator in the explicitly correlated wave function theory has been newly defined as an extension of the conventional s- and p-wave (SP) ansatz (also referred to as the FIXED amplitude ansatz) based on the linked-diagram theorem. The newly defined second-order wave operator has been applied to the calculation of the F12 correction to the third-order many-body perturbation (MP3) energy. In addition to this new wave operator, the F12 correction with the conventional first-order wave operator has been derived and calculated. Among three components of the MP3 correlation energy, the particle ladder contribution, which has shown the slowest convergence with respect to the basis set size, is fairly ameliorated by employing these F12 corrections. Both the newly defined and conventional formalisms of the F12 corrections exhibit a similar recovery of over 90% of the complete basis set limit of the particle ladder contribution of the MP3 correlation energy with a triple-zeta quality basis set for the neon atom, while the amount is about 75% without the F12 correction. The corrections to the ring term are small but the corrected energy has shown similar recovery as the particle ladder term. The hole ladder term has shown a rapid convergence even without the F12 corrections. Owing to these balanced recoveries, the deviation of the total MP3 correlation energy from the complete basis set limit has been calculated to be about 1 kcal/mol with the triple-zeta quality basis set, which is more than five times smaller than the error without the F12 correction.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据