## Abstract Quantum mechanical perturbation theory of infinite order is applied to an infinitely long biological polymeric chain. The resulting ensembleβaveraged density of electronic states is approximately calculated by truncation according to a method introduced by S. Y. Wu [(1974) __J. Math. Ph
Application of second order BWEN perturbation theory to some simple reactions
β Scribed by Mark S. Gordon
- Book ID
- 104808678
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 141 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1432-2234
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π SIMILAR VOLUMES
The selfconsistent field based theory of frequency-independent hyperpolarizabilities is adapted to the treatment of the corresponding frequency-dependent quantities. Explicit expressions are given ior the double and null frequency polarizations of a molecule in a long-estabiished oscilhrting electri
## Abstract In the framework of the pathβintegral formalism of nonrelativistic quantum theory the perturbation method is developed. This is based on the cumulative expansion of the partition function in powers of the difference between the classical actions of the exact and trial system. The trial
## Abstract The performance of multiconfigurational secondβorder perturbation techniques is established for the calculation of small magnetic couplings in heterobinuclear complexes. Whereas CASPT2 gives satisfactory results for relatively strong magnetic couplings, the method shows important deviat
Several recently proposed perturbation theories of intermolecular forces including exchange are appiied to an e.xactly soluble spin model. ## zntuodmtion In the recent literature' [l-6] there have been many methods proposed for obtaining a useful perturbation theory of intermolecular forces incl