## Abstract Quantum mechanical perturbation theory of infinite order is applied to an infinitely long biological polymeric chain. The resulting ensemble‐averaged density of electronic states is approximately calculated by truncation according to a method introduced by S. Y. Wu [(1974) __J. Math. Ph
Infinite order perturbation theory
✍ Scribed by G.G. Hall
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 244 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
A transformation of the Schrddinger equation IS demonstrated, using a factorized wavcfunction, to produce an equation whtcft IS equi~l~nt to mflnite-order perturbation theory. The fonn&sm is used to Folve wrne perturbation problems, including the quatic perturbatmn of the ~phericrtl harmonic oscdlator.
📜 SIMILAR VOLUMES
Data in the literature from NMR chemical shielding calculations at Hartree-Fock, MP2, MP3, and MP4 levels using large basis sets suggest that the ratio of the various perturbation order contributions may be approximately constant with a value of -0.5. Under this assumption one may sum the infinite
## Abstract Based on a partitioning of the total correlation energy into contributions from parallel‐ and antiparallel‐spin pairs of electrons, a modified third‐order Møller–Plesset (MP) perturbation theory is developed. The method, termed SCS–MP3 (SCS for spin‐component‐scaled) continues previous