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Contribution of the screened self-energy to the Lamb shift of quasidegenerate states

Eric-Olivier Le Bigot·Paul Indelicato·Vladimir M. Shabaev
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Abstract

Expressions for the effective Quantum Electrodynamics (QED) Hamiltonian due to self-energy screening (self-energy correction to the electron-electron interaction) are presented. We use the method of the two-time Green's function, which handles quasidegenerate atomic states. From these expression one can evaluate energy corrections to, e.g., 1s2p 3P1 and 1s2p 1P1 levels in helium and two-electron ions, to all orders in Zα

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Eric-Olivier Le Bigot, Paul Indelicato, Vladimir M. Shabaev. 2000-11-17. Contribution of the screened self-energy to the Lamb shift of quasidegenerate states. https://doi.org/10.1103/physreva.63.040501

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