Solve the DFT+DMFT double-counting problem

Resolve the double-counting problem inherent in combining density functional theory with dynamical mean-field theory, thereby establishing a consistent treatment of electronic interactions included in both the DFT and DMFT descriptions.

Background

The introduction identifies DFT+DMFT as a successful approach for describing strongly correlated materials, while noting that it contains a double-counting ambiguity: interaction effects represented in the DFT calculation must be consistently separated from those subsequently treated by DMFT. The paper states that this issue remains unresolved, although it is not the problem addressed by the present i-DFT construction.

This item is included because the paper explicitly characterizes the double-counting problem as unsolved. It concerns a broader methodological issue in correlated-electron calculations rather than a limitation specific to the proposed steady-state density-functional approach.