 Orbital-free density functional theory

Orbital-free density functional theory (OF-DFT) is a computational approach within the framework of density functional theory (DFT) that aims to describe the electronic structure of systems without explicitly considering the electronic wavefunctions (orbitals). Traditional DFT typically relies on the Kohn-Sham equations, which involve solving for the single-particle orbitals of electrons in a potential determined by electronic density.