Single-electron charging and detection in a laterally-coupled quantum dot circuit in the few-electron regime

Abstract

We provide a physical analysis of the charging and detection of the first few electrons in a laterally-coupled GaAs/AlGaAs quantum dot (LCQD) circuit with integrated quantum point contact (QPC) read-out. Our analysis is based on the numerical solution of the Kohn-Sham equation incorporated into a three-dimensional self-consistent scheme for simulating the quantum device. Electronic states and eigenenergy spectra reflecting the particular LCQD confinement shape are obtained as a function of external gate voltages. We also derive the stability diagram for the first few electrons in the device, and obtain excellent agreement with experimental data.

8 figures, submitted to Physical Review B

References in corpus (5)

• Quantum Computation with Quantum Dots
• Electron transport through double quantum dots
• Few-Electron Quantum Dot Circuit with Integrated Charge Read-Out
• The Addition Spectrum of a Lateral Dot from Coulomb and Spin Blockade Spectroscopy
• Charge Distribution in a Kondo Correlated Quantum Dot

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• Size effects in the exchange coupling between two electrons in quantum wire quantum dots
• Measurement of two-qubit states by quantum point contacts
• Engineering Exchange Coupling in Double Elliptic Quantum Dots
• Scrambling and Gate Effects in Realistic Quantum Dots