On the feasibility of a nuclear exciton laser

Nuclear excitons known from M"ossbauer spectroscopy describe coherent excitations of a large number of nuclei – analogous to Dicke states (or Dicke super-radiance) in quantum optics. In this paper, we study the possibility of constructing a laser based on these coherent excitations. In contrast to the free electron laser (in its usual design), such a device would be based on stimulated emission and thus might offer certain advantages, e.g., regarding energy-momentum accuracy. Unfortunately, inserting realistic parameters, the window of operability is probably not open (yet) to present-day technology – but our design should be feasible in the UV regime, for example.