Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Quantum Effects: QED
Q 54.5: Vortrag
Donnerstag, 17. März 2011, 15:30–15:45, SCH A01
Theory of the QFEL — •Paul Preiss1,2, Matthias Knobl2, Roland Sauerbrey1, and Wolfgang P. Schleich2 — 1Forschungszentrum Dresden-Rossendorf, 01314 Dresden, Germany — 2Institut für Quantenphysik, Universität Ulm, 89069 Ulm, Germany
Having served as a coherent light source with a widely tunable wave length the free-electron laser has become interesting for theoratical physicists once more. New developments in accelerator and laser physics raise hope for the so-called QFEL, a free-electron laser operating in the quantum mechanical regime, e. g. at the Research Center Rossendorf in Dresden.
We develop a fully quantized one-particle theory for the dynamics of the interaction between the electron and the wiggler and laser field. Our results obtained for the quantum mechanical regime are reminiscent of dynamics in two-level systems. Compared to such a two-level system with one internal degree of freedom (e. g. an atom with a ground and one excited state) the state of our system is mainly determined by the momentum of the electron in the co-moving Bambini-Renieri frame. In contrast to the classical regime here the electron propagating through the wiggler field can only emit or absorb one single photon. Transitions including the emission or absorption of many photons are significantly suppressed.