HARTREE-FOCK METHOD POSED AS A DENSITY-FUNCTIONAL THEORY - APPLICATION TO THE BE ATOM

The Hartree-Fock ground-state energy and electron density are first sh own to be derivable from a local one-body effective potential v (r). A s a nontrivial example, attention is then focused on the Be atom and i soelectronic atomic ions, the wave functions being written in terms of the density amplitude and phase. Some related general comments on the two-level one-dimensional system are included; kinetic-energy density is shown to be a local functional of electron density generated by th e harmonic-oscillator potential.