The connection between the correlation coefficients previously discussed by Kutzelnigg. de1 Re and Berthier and the correlation factors introduced by McWeeny is determined. The correlation coefficients are then discussed for some special cases. It is show that for atoms in S-states the angular corre
Electron correlation in atoms and molecules
β Scribed by T. Tsang
- Publisher
- Elsevier Science
- Year
- 1962
- Weight
- 242 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0031-8914
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract We have investigated the convergence of third order correlation energy within the hierarchies of correlation consistent basis sets for helium, neon, and water, and for three stationary points of hydrogen peroxide. This analysis confirms that singlet pair energies converge much slower th
Ab inilio CI c;llcul.lwd sTTecls 01 elecmon corrclakn on high-energ) electron scaIwring LTOFF ascrions arc prrsun~cd ror "son logelher with a relawd polenkd ensrgy analysts or the correlaCon energy. The thcorericnl rcrul~ mcludmg sllrnaws 01 the full correlation clfecls. arc In good agreemen! wth ex
## Abstract A recent method proposed to compute twoβelectron integrals over arbitrary regions of space [MartΓn PendΓ‘s, A. et al., J Chem Phys 2004, 120, 4581] is extended to deal with correlated wave functions. To that end, we use a monadic factorization of the secondβorder reduced density matrix o
W&ieIectron tnnsitions cau be induced via electron correlation. However, in many cases, such transItIons can atso be understood in terms of orbitaI relaxation and their probabiIity can be estimated from theAWe&on Hartree-Fock theory of transitions. Thus, even when complex aIgorIthms, like the RPA, f