Frankfurt 2006 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 9: Quanteninformation I
Q 9.7: Vortrag
Montag, 13. März 2006, 15:30–15:45, HI
Entanglement studies on the valence-shell photoionization — •Thomas Radtke1, Stephan Fritzsche1, and Andrey Surzhykov2 — 1Universität Kassel, Institut für Physik, D–34109 Kassel, — 2Max-Planck-Institut für Kernphysik, D–69117 Heidelberg
Atomic photoionization is certainly one of the most intensively studied physical processes today. Recently, new interest in this process has appeared within the context of quantum computing and quantum information as it allows also to observe and manipulate quantum entanglement. In particular, we have studied the effect of a single photoionization process on a pair of spin-state entangled electrons for the case of two non-interacting hydrogen-like ions [1].
In this contribution, we extend these studies towards the valence-shell photoionization of alkaline-earth metals for which the two outer electrons are naturally correlated. The initial two-electron state is thus completely entangled. We investigate the change of the degree of entanglement (in terms of the concurrence measure) between the ejected electron and the remaining alkaline-like ion in the 2s1/2 ground state as function of various parameters, such as photon energy, polarization and/or the angle of detection.
[1] T. Radtke, S. Fritzsche, A. Surzhykov, Phys. Lett. A 347 (2005) 73.