On the status of the Born-Oppenheimer expansion in molecular systems theory

It is shown that the adiabatic Born-Oppenheimer expansion does not satisfy the necessary condition for the applicability of perturbation theory. A simple example of an exact solution of a problem that can not be obtained from the Born-Oppenheimer expansion is given. A new version of perturbation the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-10, Vol.1658 (1), p.12075
Main Author: Zakharov, A Yu
Format: Article
Language:English
Subjects:
Exact solutions
Perturbation theory
Physics
System theory
Systems theory
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Summary:It is shown that the adiabatic Born-Oppenheimer expansion does not satisfy the necessary condition for the applicability of perturbation theory. A simple example of an exact solution of a problem that can not be obtained from the Born-Oppenheimer expansion is given. A new version of perturbation theory for molecular systems is proposed.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1658/1/012075