Rovibrational computations for He$_2^+$ X~$Σ_\mathrm{u}^+$ including non-adiabatic, relativistic and QED corrections Article Swipe
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,
Ádám Margócsy
·
YOU?
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· 2025
· Open Access
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· DOI: https://doi.org/10.48550/arxiv.2506.19120
· OA: W4414682822
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2506.19120
· OA: W4414682822
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. Mátyus, Phys. Rev. Lett. 125, 213001 (2020)]. As a result, all rovibrational bound states are reported with an estimated accuracy of 0.005 cm$^{-1}$.
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