Stability diagram of a few-electron triple dot

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.97.036807
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TypeArticle
Journal titlePhysical Review Letters
Volume97
Issue3
Pages036807
AbstractIndividual and coupled quantum dots containing one or two electrons have been realized and are regarded as components for future quantum information circuits. In this Letter we map out experimentally the stability diagram of the few-electron triple dot system, the electron configuration map as a function of the external tuning parameters, and reveal experimentally for the first time the existence of quadruple points, a signature of the three dots being in resonance. In the vicinity of these quadruple points we observe a duplication of charge transfer transitions related to charge and spin reconfigurations triggered by changes in the total electron occupation number. The experimental results are largely reproduced by equivalent circuit analysis and Hubbard models. Our results are relevant for future quantum mechanical engineering applications within both quantum information and quantum cellular automata architectures.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12744104
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Record identifiera4cd4719-dd44-4c62-b9cc-e15a089cb486
Record created2009-10-27
Record modified2016-05-09
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