  In the present paper we propose the use of desnity matrix formalism for the
calculation of the atomic spectroscopic properties of autoionizing states in
dense plasmas, i.e. warm dense matter and strongly coupled plasmas. This is
motivated by the importance of taking into account the effect of the electric
microfield generated by the plasma charge constituents in the calculation of
the atomic populations of autoionizing states. For autoionizing states,
electron densities justifying the statistical approach exceed solid density
bringing serious doubts to the statistical approach even in dense plasmas. This
leads also to the change of the spectral line shapes in the frame of the
standard methods. We discuss the importance of the present analysis in view of
the radiation emission originating from dense plasmas created by the
interaction of the X-ray Free Electron Lasers (XFEL) with solid density matter.
