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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.08213 |
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| _version_ | 1866917835441176576 |
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| author | Janke, Kjell Wedenig, Andrés Emilio Schwerdtfeger, Peter Gaul, Konstantin Berger, Robert |
| author_facet | Janke, Kjell Wedenig, Andrés Emilio Schwerdtfeger, Peter Gaul, Konstantin Berger, Robert |
| contents | Vacuum polarisation (VP) and electron self energy (SE) are implemented and evaluated as quantum electrodynamic (QED) corrections in a (quasi-relativistic) two-component zeroth order regular approximation (ZORA) framework. For VP, the Uehling potential is considered, and for SE, the effective potentials proposed by Flambaum and Ginges as well as the one proposed by Pyykkö and Zhao. QED contributions to ionisation energies of various atoms and group 2 monofluorides, group 1 and 11 valence orbital energies, $^2\mathrm{P}_{1/2} \leftarrow {}^{2}\mathrm{S}_{1/2}$ and $^{2}\mathrm{P}_{3/2} \leftarrow {}^{2}\mathrm{S}_{1/2}$ transition energies of Li-, Na-, and Cu-like ions of nuclear charge $Z$ = 10, 20, ..., 90 as well as $Π_{1/2}\leftarrow Σ_{1/2}$ and $Π_{3/2}\leftarrowΣ_{1/2}$ transition energies of BaF and RaF are presented. Furthermore, perturbative and self-consistent treatments of QED corrections are compared for Kohn--Sham orbital energies of gold. It is demonstrated, that QED corrections can be obtained in a two-component ZORA framework efficiently and in excellent agreement with corresponding four-component results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_08213 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum electrodynamic corrections for molecules: Vacuum polarisation and electron self energy in a two-component relativistic framework Janke, Kjell Wedenig, Andrés Emilio Schwerdtfeger, Peter Gaul, Konstantin Berger, Robert Chemical Physics Atomic Physics Vacuum polarisation (VP) and electron self energy (SE) are implemented and evaluated as quantum electrodynamic (QED) corrections in a (quasi-relativistic) two-component zeroth order regular approximation (ZORA) framework. For VP, the Uehling potential is considered, and for SE, the effective potentials proposed by Flambaum and Ginges as well as the one proposed by Pyykkö and Zhao. QED contributions to ionisation energies of various atoms and group 2 monofluorides, group 1 and 11 valence orbital energies, $^2\mathrm{P}_{1/2} \leftarrow {}^{2}\mathrm{S}_{1/2}$ and $^{2}\mathrm{P}_{3/2} \leftarrow {}^{2}\mathrm{S}_{1/2}$ transition energies of Li-, Na-, and Cu-like ions of nuclear charge $Z$ = 10, 20, ..., 90 as well as $Π_{1/2}\leftarrow Σ_{1/2}$ and $Π_{3/2}\leftarrowΣ_{1/2}$ transition energies of BaF and RaF are presented. Furthermore, perturbative and self-consistent treatments of QED corrections are compared for Kohn--Sham orbital energies of gold. It is demonstrated, that QED corrections can be obtained in a two-component ZORA framework efficiently and in excellent agreement with corresponding four-component results. |
| title | Quantum electrodynamic corrections for molecules: Vacuum polarisation and electron self energy in a two-component relativistic framework |
| topic | Chemical Physics Atomic Physics |
| url | https://arxiv.org/abs/2411.08213 |