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.

Highlights

  • We report the computer-automated tuning of gate-defined semiconductor double quantum dots in GaAs heterostructures

  • the pinch-off value of the single gate T that is shared by all the quantum dots

  • Electrostatically defined semiconductor quantum dots have been the focus of intense research for the application

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