Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Poster I
A 15.2: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster
Polarization and entanglement studies on the two-photon transitions in hydrogenlike ions — •Filippo Fratini1,2, Stephan Fritzsche2,3, and Andrey Surzhykov1,2 — 1Universität Heidelberg — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Frankfurt Institute for Advanced Studies
During the last two decades entanglement and polarization studies on the two–photon emission from few–electron ions and atoms have attracted particular interest both in experiment and theory. While, however, most investigations in the past have dealt with low–Z atomic systems, much of today’s interest is focused on the high–Z region. At the GSI facility in Darmstadt, for example, two–photon polarization experiments with highly–charged heavy ions are likely to be carried out in the next few years. In order to provide theoretical support for these experiments, we apply the density matrix formalism based on Dirac’s relativistic equation in order to describe the polarization states of two emitted photons. By using such a formalism, we are able to analyze correlations between the linear polarization of the photons in the 2s1/2 → 1s1/2 and 3d5/2 → 1s1/2 decay of neutral hydrogen H as well as hydrogen–like Xe53+ and U91+ ions. For these ions, we analyze the non–dipole contributions to the polarization correlations and compare our results obtained within the fully relativistic and the electric dipole [1] approximations.
[1] T. Radtke, A. Surzhykov, and S. Fritzsche, PRA 77, 002507 (2008).