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A nondiagonal quasidegenerate fourth-order perturbation theory

✍ Scribed by Kathleen Kuhler; Mark R. Hoffmann


Publisher
Springer
Year
1996
Tongue
English
Weight
873 KB
Volume
20
Category
Article
ISSN
0259-9791

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📜 SIMILAR VOLUMES


Approximate fourth-order perturbation th
✍ R. Krishnan; J. A. Pople 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 418 KB

## Abstract An approximate fourth‐order expression for the electron correlation energy in the Møller–Plesset perturbation scheme is proposed. It takes into account all the contributions to the fourthorder energy neglecting only those of the triple‐substituted determinants. It is size consistent and