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Quantum free-electron laser
For years free-electron lasers (FEL) serve as a source of coherent and
brillant radiation. A widely tunable wavelength - reaching from
microwaves up to the X-ray regime - is the most interesting advantage of
such devices. However, since all realized FEL devices operate in the
so-called classical regime where the recoil due to the emission of
radiation hardly affects the dynamics of the electrons such effects have
been mainly ignored in the classical as well as quantum mechanical
theories for the FEL. Due to technical advances these effects may become
important. Thus, we deal with the problems appearing in the theoratical
description of quantum free-electron lasers (QFEL).
 | Pendel Lösung
In an approach to relate the QFEL to atomic systems, we introduce energy levels for the collective system.
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