Journal
PHYSICAL REVIEW A
Volume 85, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.012514
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Funding
- Swedish Research Council
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We present results from numerical calculations in the Coulomb gauge of the first-order self-energy shift of bound hydrogenic states in highly stripped ions. We apply the expressions for the renormalized free-electron self-energy and vertex operators obtained by G. S. Adkins [Phys. Rev. D 27, 1814 (1983); 34, 2489 (1986)] to the evaluation of the zero-and one-potential terms. It is found that in this gauge the contribution from the many-potential term, which limits the overall accuracy, is significantly smaller than in the covariant Feynman gauge. This enables us to improve the accuracy of the self-energy prediction considerably compared to that obtained in the corresponding Feynman-gauge calculations.
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