Description of a homogeneous electron gas with simple functionals of the one-particle density matrix - art. no. 034503

摘要

The momentum distributions of a homogeneous electron gas, arising from a simple one-matrix functional For the electron-electron repulsion energy that generalizes the Hartree-Fock and Goedecker-Umrigar approximations, are analyzed in detail. Their properties are found to depend strongly on the exponent beta that enters the functional. Smooth momentum distributions that, together with the corresponding energies per particle, exhibit simple scaling behavior with respect to the electron density rho, are obtained only for 4/5