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physics.atom-ph2026
A QED Functional Formulation of Relativistic Many-Body Perturbation Theory in Atoms
Cedric de Jonge, Zoltán Harman
We systematically derive relativistic many-body perturbation theory (RMBPT) from the two-particle irreducible effective action of quantum electrodynamics (QED) in the Furry picture…
physics.atom-ph2026
Wichmann-Kroll Correction to the Interelectronic Interaction in He- and Li-Like Ions
J. Sommerfeldt, V. A. Yerokhin, Z. Harman +1
We present a theoretical study of the higher-order QED contribution to the interelectronic interaction in He- and Li-like ions, where a virtual electron-positron loop is inserted i…