title: Reference electronic structure calculations in one dimension.
abstract: Large strongly correlated systems provide a challenge to modern electronic structure methods, because standard density functionals usually fail and traditional quantum chemical approaches are too demanding. The density-matrix renormalization group method, an extremely powerful tool for solving such systems, has recently been extended to handle long-range interactions on real-space grids, but is most efficient in one dimension where it can provide essentially arbitrary accuracy. Such 1d systems therefore provide a theoretical laboratory for studying strong correlation and developing density functional approximations to handle strong correlation, if they mimic three-dimensional reality sufficiently closely. We demonstrate that this is the case, and provide reference data for exact and standard approximate methods, for future use in this area.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA. lwagner@uci.edu.
authors.forename: Lucas O
authors.initials: LO
authors.lastname: Wagner
authors.forename: E M
authors.initials: EM
authors.lastname: Stoudenmire
authors.forename: Kieron
authors.initials: K
authors.lastname: Burke
authors.forename: Steven R
authors.initials: SR
authors.lastname: White