Quantum dots and quantum dot lattices: Correlations in small quantal systems

M. Borgh, M. Toreblad, S. Åberg, S. M. Reimann, M. Koskinen, M. Manninen

Research output: Chapter in Book/Report/Conference proceedingChapter


Recently, Attaccalite et al. proposed a new expression for the exchange-correlation energy of the two-dimensional electron gas, based on quantum Monte Carlo calculations. We compare this functional with the established expression given by Tanatar and Ceperley for use in density functional calculations. As model systems serve a circular few-electron quantum dot and a square lattice of dots. For single dots, electronic structure calculations are performed using both energy functionals for the self-consistent solution of the Kohn-Sham equations. The results are compared with those of a numerical diagonalization of the many-body Hamiltonian.

Original languageEnglish
Title of host publicationClusters and Nano-Assemblies
Subtitle of host publicationPhysical and Biological Systems: Richmond, Virginia, U.S.A., 10-13 November, 2003
PublisherWorld Scientific Publishing Co. Pte Ltd
Number of pages8
ISBN (Electronic)9789812701879
ISBN (Print)9812563318, 9789812563316
Publication statusPublished - 1 Jan 2005
Externally publishedYes

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