Stability Diagram of a Few-Electron Triple Dot
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- 21 July 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 97 (3), 036807
- https://doi.org/10.1103/physrevlett.97.036807
Abstract
Individual 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.Keywords
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This publication has 25 references indexed in Scilit:
- Charge sensing of an artificialmolecule in lateral quantum dotsPhysical Review B, 2005
- Pairing of Spin Excitations in Lateral Quantum DotsPhysical Review Letters, 2004
- Manipulation of a Single Charge in a Double Quantum DotPhysical Review Letters, 2004
- Excitonic Energy Shell Structure of Self-Assembled InGaAs/GaAs Quantum DotsPhysical Review Letters, 2004
- Spin-Blockade Spectroscopy of a Two-Level Artificial MoleculePhysical Review Letters, 2003
- Few-electron quantum dot circuit with integrated charge read outPhysical Review B, 2003
- Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopyPhysical Review B, 2000
- Excitation Spectra of Circular, Few-Electron Quantum DotsScience, 1997
- Shell Filling and Spin Effects in a Few Electron Quantum DotPhysical Review Letters, 1996
- Measurements of Coulomb blockade with a noninvasive voltage probePhysical Review Letters, 1993