A modified perturbation theory: Iterative partitioning of the hamiltonian

A modified perturbation theory on the basis of conventional procedures with an iterated decomposition of the hamiltonian is proposed. As is demonstrated in simple applications the convergency is accelerated and the expansion may be efficient even when the perturbation is not small. The expenditure o...

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Bibliographic Details
Published in:Physics letters. A 1988-11, Vol.133 (4), p.231-238
Main Authors: Bulk, G., Jelitto, R.J.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Calculations and mathematical techniques in atomic and molecular physics (excluding electron correlation calculations)
Electronic structure of atoms, molecules and their ions: theory
Exact sciences and technology
Physics
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Summary:A modified perturbation theory on the basis of conventional procedures with an iterated decomposition of the hamiltonian is proposed. As is demonstrated in simple applications the convergency is accelerated and the expansion may be efficient even when the perturbation is not small. The expenditure of numerical implementation is comparable to the standard methods and there is only little additional computation effort.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(88)91022-5