Friday, December 8, 2000, 16:00
WHGA Auditorium
Prof. G. Soff, Dresden
Abstract:
Highly charged ions (HCI) provide an ideal testing
ground for quantum electrodynamics (QED) of strong fields.
Radiative corrections to bound electron states are
calculated and compared with recent experimental
Lamb-shift data. It is demonstrated that traditional
perturbation expansions in the external field break down.
Possible measurements of the time-dependence of
fundamental constants are briefly discussed.
Modifications of electron-electron correlations
and of the g-factor of bound electrons due to
QED radiative corrections are derived.
The hyperfine splitting in highly charged ions is
investigated as a test of QED in strong magnetic fields.
As an extension we propose new experiments for
parity violating processes in HCI as a test of the
electroweak interaction in strong external fields.