Abstract
The universal functional of Hohenberg-Kohn is given as a coupling-constant integral over the density as a functional of the potential. Conditions are derived under which potential-functional approximations are variational. Construction via this method and imposition of these conditions are shown to greatly improve the accuracy of the noninteracting kinetic energy needed for orbital-free Kohn-Sham calculations.
Original language | English |
---|---|
Article number | 236404 |
Journal | Physical Review Letters |
Volume | 106 |
Issue number | 23 |
DOIs | |
State | Published - 10 Jun 2011 |
Externally published | Yes |