Computer-automated tuning of semiconductor double quantum dots into the single-electron regime

Journal article (2016)

Authors

T.A. Baart QCD/Vandersypen Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre, Kavli institute of nanoscience Delft
P.T. Eendebak TNO, BUS/General , QuTech Advanced Research Centre
C. Reichl ETH Zürich
W. Wegscheider ETH Zürich
L.M.K. Vandersypen QCD/Vandersypen Lab - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft, QuTech Advanced Research Centre
Research Group
QCD/Vandersypen Lab (QuTech Advanced Research Centre) (TU Delft)
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Published Date

2016

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Computing Division

Research Group

QCD/Vandersypen Lab

Abstract

We report the computer-automated tuning of gate-defined semiconductor double quantum dots in GaAs heterostructures. We benchmark the algorithm by creating three double quantum dots inside a linear array of four quantum dots. The algorithm sets the correct gate voltages for all the gates to tune the double quantum dots into the single-electron regime. The algorithm only requires (1) prior knowledge of the gate design and (2) the pinch-off value of the single gate T that is shared by all the quantum dots. This work significantly alleviates the user effort required to tune multiple quantum dot devices.