Coulomb-gauge calculation of the combined effect of correlation and QED for heliumlike highly charged ions

• Verfasst von: Holmberg, Johan [VerfasserIn]
• Verfasst von: Salomonson, Sten [VerfasserIn]
• Verfasst von: Lindgren, Ingvar [VerfasserIn]
• Titel: Coulomb-gauge calculation of the combined effect of correlation and QED for heliumlike highly charged ions
• Verf.angabe: J. Holmberg, S. Salomonson, I. Lindgren
• E-Jahr: 2015
• Jahr: 9 July 2015
• Umfang: 10 S.
• Fussnoten: Gesehen am 07.09.2020
• Titel Quelle: Enthalten in: Physical review / A
• Ort Quelle: College Park, Md., 1970
• Jahr Quelle: 2015
• Band/Heft Quelle: 92(2015,1) Artikel-Nummer 012509, 10 Seiten
• ISSN Quelle: 1094-1622
• DOI: doi:10.1103/PhysRevA.92.012509
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 172902789X

Abstract

We present numerical results for the energy shift due to the combination of Coulomb-correlation and quantum-electrodynamic effects in the ground state of heliumlike highly charged ions. The combined effect of two or more Coulomb interactions together with a single retarded photon, including radiative effects, is calculated for various atomic numbers in the range Z=14 to Z=50. One step in our computational scheme involves the evaluation of the Coulomb-screened self-energy at the two-photon level, and we present a detailed comparison between the Coulomb and Feynman gauges with regard to the various contributions to this effect.