Non-perturbative calculation of the two-loop Lamb shift in Li-like ions

Abstract

A calculation valid to all orders in the nuclear-strength parameter is presented for the two-loop Lamb shift, notably for the two-loop self-energy correction, to the 2p-2s transition energies in heavy Li-like ions. The calculation removes the largest theoretical uncertainty for these transitions and yields the first experimental identification of two-loop QED effects in the region of the strong binding field.

References in corpus (3)

• Nonrelativistic QED approach to the Lamb shift
• Two-Loop Bethe Logarithms
• Calculation of the One- and Two-Loop Lamb Shift for Arbitrary Excited Hydrogenic States

Cited by in corpus (7)

• Nuclear deformation effect on the binding energies in heavy ions
• QED and relativistic corrections in superheavy elements
• QED treatment of electron correlation in Li-like ions
• Two-loop QED corrections with closed fermion loops
• QED calculation of the 2p1/2-2s and 2p3/2-2s transition energies and the ground-state hyperfine splitting in lithiumlike scandium
• Parity nonconservation in radiative recombination of electrons with heavy hydrogenlike ions
• Two-Loop Effects and Current Status of the 4He+ Lamb Shift