Density-functional theory of the Compton profile anisotropy of copper metal

Band structure calculations of the Compton profiles of copper are compared with the experiment in the light of a rigorous interpretation of momentum densities in the Hohenberg-Kohn-Sham ground state density-functional formalism. There are strong evidences that the significant discrepancies for the Compton profile anisotropies do not originate from inaccurate solutions of the Kohn-Sham self-consistent equations, but from a non-local momentum density correlation correction functional.