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- Meta van Faassen, Paul L de Boeij, Robert van Leeuwen, Jeff A. Berger, Jaap G. Snijders
- Physical review letters
- 2002

We solve the long-standing problem of the large overestimation of the static polarizability of conjugated polymers obtained using the local density approximation within density-functional theory. Theâ€¦ (More)

- Niko SÃ¤kkinen, Yang Peng, Heiko Appel, Robert van Leeuwen
- The Journal of chemical physics
- 2015

We present a Kadanoff-Baym formalism to study time-dependent phenomena for systems of interacting electrons and phonons in the framework of many-body perturbation theory. The formalism takesâ€¦ (More)

- Niko SÃ¤kkinen, Yang Peng, Heiko Appel, Robert van Leeuwen
- The Journal of chemical physics
- 2015

We study ground-state properties of a two-site, two-electron Holstein model describing two molecules coupled indirectly via electron-phonon interaction by using both exact diagonalization andâ€¦ (More)

- Nils Erik Dahlen, Robert van Leeuwen
- Physical review letters
- 2007

We implement time propagation of the nonequilibrium Green function for atoms and molecules by solving the Kadanoff-Baym equations within a conserving self-energy approximation. We here demonstrateâ€¦ (More)

- Michael Ruggenthaler, Markus Penz, Robert van Leeuwen
- Journal of physics. Condensed matter : anâ€¦
- 2015

In this work we review the mapping from densities to potentials in quantum mechanics, which is the basic building block of time-dependent density-functional theory and the Kohn-Sham construction. Weâ€¦ (More)

- Nils Erik Dahlen, Robert van Leeuwen
- The Journal of chemical physics
- 2005

We have calculated the self-consistent Green's function for a number of atoms and diatomic molecules. This Green's function is obtained from a conserving self-energy approximation, which implies thatâ€¦ (More)

- Y. Pavlyukh, A-M Uimonen, Gianluca Stefanucci, Robert van Leeuwen
- Physical review letters
- 2016

We present a systematic study of vertex corrections in a homogeneous electron gas at metallic densities. The vertex diagrams are built using a recently proposed positive-definite diagrammaticâ€¦ (More)

- Klaas J. H. Giesbertz, Robert van Leeuwen
- The Journal of chemical physics
- 2014

Electron correlations in molecules can be divided in short range dynamical correlations, long range Van der Waals type interactions, and near degeneracy static correlations. In this work, we analyzeâ€¦ (More)

- Robert van Leeuwen, Johannes Neugebauer, Lucas Visscher, F. Matthias Bickelhaupt
- Physical chemistry chemical physics : PCCP
- 2016

The present issue presents a state-of-theart collection of articles on density functional theory and celebrates the enormous contributions that Evert Jan Baerends has made to this research field.â€¦ (More)

- Robert van Leeuwen, Wim Ubachs, W. Hogerworst
- EQEC'96. 1996 European Quantum Electronicâ€¦
- 1996