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Equations for linked clusters and Brueckner-Bethe theory

✍ Scribed by K.H. Lührmann; H. Kümmel

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
521 KB
Volume
194
Category
Article
ISSN
0375-9474

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📜 SIMILAR VOLUMES

An alternative expression for the pertur
An alternative expression for the perturbative triples correction to Brueckner coupled-cluster doubles theory
✍ Gustavo E. Scuseria 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 551 KB

The Brueckner model, which is a version of coupled-cluster theory where orbitals are optimized to yield zero single-excitation amplitudes (T,=O), naturally leads to the definition of an effective one-particle Hamiltonian F (or Brueckner Hamiltonian) which effectively accounts for correlation effects

The linked-cluster theorem in the open-s
The linked-cluster theorem in the open-shell coupled-cluster theory for incomplete model spaces
✍ Debashis Mukherjee 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 666 KB

The linked-cluster theorem (LCT) holds good in open-shell coupled-cluster theory Car incomplete model spaces provided the intermediate normalization condition (IN) for the eigenfunctions is abandoned. The crucial requirement for proving the LCT is the valence u~vers~ty of the wave operator 52. Thus