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Engineering of Exchange Interactions in Electrostatic Quantum Dots for Information Processing

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Abstract:

A theoretical analysis of the electronic properties of a few-electron system confined in multiple coupled quantum dots (QDs) is presented. Accurate numerical approaches of the exact diagonalization and Monte Carlo to compute energy spectra and other relevant quantities of the confined many-electron system are described. General features such as single electron tunneling and charge stability diagram in QDs are reviewed. Level crossings with corresponding density variations (rotations) in coupled QD structures with large aspect ratios and their effects on the charge stability diagram and addition energy spectra are then discussed.

Keywords: EXACT DIAGONALIZATION; EXCHANGE COUPLING; QUANTUM COMPUTING; QUANTUM DOT; VARIATIONAL MONTE CARLO; VON NEUMANN-WIGNER THEOREM

Document Type: Review Article

DOI: http://dx.doi.org/10.1166/jctn.2011.1709449

Publication date: March 1, 2011

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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