Second-order adiabatic connection: The theory and application to two electrons in a parabolic confinement
Chemical Physics
2023-10-18 v1
Abstract
The adiabatic connection formalism, usually based on the first-order perturbation theory, has been generalized to an arbitrary order. The generalization stems from the observation that the formalism can be derived from a properly arranged Taylor expansion. The second-order theory is developed in detail and applied to the description of two electrons in a parabolic confinement (harmonium). A significant improvement relative to the first-order theory has been obtained.
Keywords
Cite
@article{arxiv.2310.11073,
title = {Second-order adiabatic connection: The theory and application to two electrons in a parabolic confinement},
author = {Andreas Savin and Jacek Karwowski},
journal= {arXiv preprint arXiv:2310.11073},
year = {2023}
}