Adiabatic-connection fluctuation-dissipation density-functional theory   based on range separation
  An adiabatic-connection fluctuation-dissipation theorem approach based on a range separation of electron-electron interactions is proposed. It involves a rigorous combination of short-range density functional and long-range random phase approximations. This method corrects several shortcomings of the standard random phase approximation and it is particularly well suited for describing weakly-bound van der Waals systems, as demonstrated on the challenging cases of the dimers Be$_2$ and Ne$_2$. 
Julien Toulouse, Iann C. Gerber, Georg Jansen, Andreas Savin and   J\'anos G. \'Angy\'an