Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Precision spectroscopy of atoms and ions II
A 30.5: Vortrag
Donnerstag, 15. März 2012, 12:00–12:15, V47.03
Test of many-electron QED effects in the presence of magnetic fields — •Andrey Volotka1, Dmitry Glazov2, Oleg Andreev2, Vladimir Shabaev2, Ilya Tupitsyn2, and Günter Plunien1 — 1Institut für Theoretische Physik, TU Dresden — 2St. Petersburg State University, Russia
Recent progress in rigorous QED calculations of the hyperfine splitting and g factor of highly charged Li-like ions will be reported. A special attention will be paid to the evaluation of the two-photon exchange corrections in the presence of a magnetic field. Together with the screening radiative corrections they represent the most difficult many-electron QED diagrams, which have been so far rigorously evaluated. As a result, the accuracy for the specific difference between the hyperfine splitting values of H- and Li-like ions as well as for the g factor of Li-like ions has been significantly increased, thus providing the theoretical prerequisite for a test of many-electron QED effects at strong electromagnetic fields.