PROJECTS

Ab-initio QED calculations of spectra and transition probabilities in atomic few-electron systems

PRINCIPAL INVESTIGATOR

Prof. Dr. Gerhard Soff Technische Universität Dresden Theoretische Physik Zellescher Weg 17 01069 Dresden +49 (0)351 463 33842 +49 (0)351 463 37299 soff@physik.tu-dresden.de

PROJECT RESEARCH ASSISTANT

ABSTRACT

The major task of this project is to develop methods for complete ab-initio QED calculations which apply to the atomic many-electron problem. It is intended to perform atomic structure calculations going beyond the approximations of standard relativistic manybody perturbations theory and treating simultaneously electron-correlation and QED-radiative effects on the same fundamental level of description. Particular emphasis is lead on deriving gauge-independent results. The development of adequate schemes for numerical computations will be based on new general finite-basis-set representations of the complete Dirac spectrum in the presence of non-coulomb potentials. Numerical calculations of screened QED radiative, interelectron interactions and electroweak corrections in neutral atoms and few-electron ions will be performed. To extend these calculation methods for applications to dynamical QED processes is also within the scope of this project. The influence of QED and interelectron interaction corrections on the shape of the line profile of excited states will be investigated. To provide an ab-initio QED description of double-ionization of heliumlike ions via single-photon absorption for the entire relativistic domain is intended.