Rovibrational computations for He$_2^+$ X $\Sigma_\mathrm{u}^+$ including non-adiabatic, relativistic and QED corrections
Chemical Physics
2026-02-25 v3
Abstract
We report the potential energy curve, the diagonal Born-Oppenheimer, non-adiabatic mass, relativistic, and leading-order QED corrections for the ground electronic state of the helium dimer cation; the higher-order QED and finite-nuclear size effects are also estimated. The computations are carried out with an improved error control and over a much broader configuration range compared to earlier work [D. Ferenc, V. I. Korobov, and E. M\'atyus, Phys. Rev. Lett. 125, 213001 (2020)]. As a result, all rovibrational bound states are reported with an estimated accuracy of 0.005 cm.
Keywords
Cite
@article{arxiv.2506.19120,
title = {Rovibrational computations for He$_2^+$ X $\Sigma_\mathrm{u}^+$ including non-adiabatic, relativistic and QED corrections},
author = {Edit Mátyus and Ádám Margócsy},
journal= {arXiv preprint arXiv:2506.19120},
year = {2026}
}