31 citations · 62 across the 7 of their papers we have counts for
7 papers
QED effects in scattering processes involving atomic bound states: Radiative recombination
Ingvar Lindgren, Sten Salomonson, Johan Holmberg
The standard S-matrix formulation cannot generally be used in the treatment of atomic scattering processes, involving bound-state QED effects, due to the special type of singularit…
Energy-dependent perturbation theory: Possibility for improved tests of quantum-electrodynamics
Ingvar Lindgren, Sten Salomonson, Johan Holmberg
Measurements of energy separations in highly charged ions can in many cases nowadays be performed with very high accuracy, an accuracy that sometimes cannot be matched by the corre…
Dimensional regularization of the free-electron self-energy and vertex correction in Coulomb gauge
Ingvar Lindgren
There is presently a great interest in studying static and dynamic properties of highly charged ions that can be produced in large particle accelerators, like that at GSI in Darmst…
The helium fine-structure controversy
Ingvar Lindgren
There is presently disagreement between theory and experiment as well as between different theoretical calculations concerning the fine-structure splitting of the lowest P state of…
Many-body perturbation procedure for energy-dependent perturbation: Merging many-body perturbation theory with QED
Ingvar Lindgren, Sten Salomonson, Daniel Hedendahl
A formalism for energy-dependent many-body perturbation theory (MBPT), previously indicated in our recent review articles (Lindgren et al., Phys.Rep. 389,161(2004), Can.J.Phys. 83,…
Many-body-QED perturbation theory: Connection to the Bethe-Salpeter equation
Ingvar Lindgren
The connection between many-body theory (MBPT)--in perturbative and non-perturbative form--and quantum-electrodynamics (QED) is reviewed for systems of two fermions in an external…