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Note on the perturbation theory of electron correlation

✍ Scribed by Werner Kutzelnigg

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 299 KB
Volume: 35
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(75)85333-4

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✦ Synopsis

The n-electron Hilbeert space is pnrtitioned into three ports by means of the projection operators P, Q, R such that P is associated with the known zeroth order wavefunction @, Q with the subspace of iunctions that are singly or doubly substituted wirh respacr to Q and R with the rest. The perturbntion expnnsion based on this partition has some advantages compared with conventiomd expansions and is helpful for an analysis of correlatian CffCC_& in rl-&CtrOn SyStCmS.

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