Non-Perturbative Theory for Dispersion Self-Energy of Atoms

TL;DR

This paper introduces a non-perturbative approach to calculating atomic dispersion self-energies, revealing significant corrections over traditional series-expansion methods, especially for smaller noble gases.

Contribution

It develops a non-perturbative theoretical framework that significantly improves the accuracy of dispersion self-energy calculations for atoms.

Findings

Non-perturbative theory alters self-energy estimates.

Up to 100% correction for small noble gases.

Traditional series-expansion methods underestimate self-energies.

Abstract

We go beyond the approximate series-expansions used in the dispersion theory of finite size atoms. We demonstrate that a correct, and non-perturbative, theory dramatically alters the dispersion selfenergies of atoms. The non-perturbed theory gives as much as 100% corrections compared to the traditional series expanded theory for the smaller noble gas atoms.