K
Klaus Capelle
Researcher at Universidade Federal do ABC
Publications - 98
Citations - 2341
Klaus Capelle is an academic researcher from Universidade Federal do ABC. The author has contributed to research in topics: Density functional theory & Hubbard model. The author has an hindex of 24, co-authored 97 publications receiving 2182 citations. Previous affiliations of Klaus Capelle include University of Würzburg & Lund University.
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A bird's-eye view of density-functional theory
TL;DR: In this paper, the authors present an outgrowth of lectures the author gave at the Physics Institute and the Chemistry Institute of the University of Sao Paulo at Sao Carlos, Brazil, and at the VIII'th Summer School on Electronic Structure of the Brazilian Physical Society.
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Density Functionals Not Based on the Electron Gas: Local-Density Approximation for a Luttinger Liquid
TL;DR: By shifting the reference system for the local-density approximation (LDA) from the electron gas to other model systems, one obtains a new class of density functionals, which by design account for the correlations present in the chosen reference system.
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Density functionals and model Hamiltonians: Pillars of many-particle physics
Klaus Capelle,Vivaldo L. Campo +1 more
TL;DR: In this paper, the authors describe connections between density functional theory (DFT) and model Hamiltonians, and illustrate the connections for the Hubbard model and the Heisenberg model, as well as other models that have been treated with DFT.
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Nonuniqueness of the potentials of spin-density-functional theory.
Klaus Capelle,Giovanni Vignale +1 more
TL;DR: It is shown that, contrary to widely held beliefs, the potentials of spin-density-functional theory (SDFT) are not unique functionals of the spin densities, implying that the zero-temperature exchange-correlation energy is not always a differentiable functional of thespin density.
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Spin-Density Functionals from Current-Density Functional Theory and Vice Versa: A Road towards New Approximations
Klaus Capelle,E. K. U. Gross +1 more
TL;DR: In this article, it was shown that the exchange-correlation functional of spin-density functional theory is identical, on a certain set of densities, with the exchange correlation functional of current density functional theory.