Effective quantum electrodynamics: One-dimensional model of the relativistic hydrogen-like atom

• URL: http://arxiv.org/abs/2305.13787v2
• Date: Mon, 26 Jun 2023 12:33:13 GMT
• Title: Effective quantum electrodynamics: One-dimensional model of the relativistic hydrogen-like atom
• Authors: Timoth\'ee Audinet (LCT), Julien Toulouse (LCT, IUF)
• Abstract summary: We consider a one-dimensional effective quantum electrodynamics model of the relativistic hydrogen-like atom. The present work may be considered as a step toward the development of a quantum-chemistry effective QED theory of atoms and molecules.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We consider a one-dimensional effective quantum electrodynamics (QED) model of the relativistic hydrogen-like atom using delta-potential interactions. We discuss the general exact theory and the Hartree-Fock approximation. The present one-dimensional effective QED model shares the essential physical feature of the three-dimensional theory: the nuclear charge polarizes the vacuum state (creation of electron-positron pairs) which results in a QED Lamb-type shift of the bound-state energy. Yet, this 1D effective QED model eliminates some of the most serious technical difficulties of the three-dimensional theory coming from renormalization. We show how to calculate the vacuum-polarization density at zeroth order in the two-particle interaction and the QED Lamb-type shift of the bound-state energy at first order in the two-particle interaction. The present work may be considered as a step toward the development of a quantum-chemistry effective QED theory of atoms and molecules.

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