title: One-dimensional continuum electronic structure with the density-matrix renormalization group and its implications for density-functional theory.
abstract: We extend the density matrix renormalization group to compute exact ground states of continuum many-electron systems in one dimension with long-range interactions. We find the exact ground state of a chain of 100 strongly correlated artificial hydrogen atoms. The method can be used to simulate 1D cold atom systems and to study density-functional theory in an exact setting. To illustrate, we find an interacting, extended system which is an insulator but whose Kohn-Sham system is metallic.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, 92697, USA.
authors.forename: E M
authors.initials: EM
authors.lastname: Stoudenmire
authors.forename: Lucas O
authors.initials: LO
authors.lastname: Wagner
authors.forename: Steven R
authors.initials: SR
authors.lastname: White
authors.forename: Kieron
authors.initials: K
authors.lastname: Burke