Shell Model in the Complex Energy Plane
  This work reviews foundations and applications of the complex-energy continuum shell model that provides a consistent many-body description of bound states, resonances, and scattering states. The model can be considered a quasi-stationary open quantum system extension of the standard configuration interaction approach for well-bound (closed) systems. 
N. Michel, W. Nazarewicz, M. Ploszajczak, T. Vertse