title: Semiclassical origins of density functionals.
abstract: The relation between semiclassical and density-functional approximations is clarified. Semiclassical approximations both explain and improve upon density-gradient expansions for finite systems. We derive highly accurate density and kinetic energy functionals of the potential in one dimension.
authors.affiliation: Department of Chemistry, University of California, Irvine, California 92697, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Elliott
authors.forename: Donghyung
authors.initials: D
authors.lastname: Lee
authors.forename: Attila
authors.initials: A
authors.lastname: Cangi
authors.forename: Kieron
authors.initials: K
authors.lastname: Burke