From the 2 of 38 linked papers with an AI index.
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Higher-order corrections to the field shift in atomic systems
V. A. Yerokhin, Z. Harman, C. H. Keitel
The paper develops a systematic expansion for higher-order contributions to the field shift in atomic spectra, validates it with numerical calculations for hydrogen-like ions, and…
Wichmann-Kroll Correction to the Interelectronic Interaction in He- and Li-Like Ions
J. Sommerfeldt, V. A. Yerokhin, Z. Harman +1
The paper calculates the higher‑order Wichmann‑Kroll QED correction to the interelectronic interaction in helium‑ and lithium‑like ions, improving numerical convergence and providi…
Quasiperiodic nondipole ionization dynamics in the x-ray stabilization regime
Aleksandr V. Boitsov, Karen Z. Hatsagortsyan, Christoph H. Keitel
Recent advances in strong x-ray laser techniques enable the study of nonlinear multiphoton ionization in extreme high-frequency fields. Although the stabilization regime in such fi…
Role of quantum dynamics in coherent and incoherent radiation during tunneling ionization
Michael Klaiber, Karen Z. Hatsagortsyan, Christoph H. Keitel
Radiation during strong-field tunneling ionization is investigated. The spontaneous as well as the coherent components of the radiation are calculated describing the ionization dyn…
Fermion selective tests of new physics with the bound electron g-factor
Matteo Moretti, Christoph H. Keitel, Zoltán Harman
The use of high-precision measurements of the factor of single-electron ions is considered as a detailed probe for physics beyond the Standard Model. The contribution of the ex…
Two-loop vacuum polarization in a Coulomb field
S. A. Volkov, V. A. Yerokhin, Z. Harman +1
The leading-order two-loop vacuum-polarization potential, linear in the Coulomb field of a nucleus, was first derived in the seminal 1955 work of Källén-Sabry. The higher-order t…