Kavli Affiliate: Menno Veldhorst
| First 5 Authors: Marcel Meyer, Corentin Déprez, Ilja N. Meijer, Florian K. Unseld, Saurabh Karwal
| Summary:
The small footprint of semiconductor qubits is favourable for scalable
quantum computing. However, their size also makes them sensitive to their local
environment and variations in gate structure. Currently, each device requires
tailored gate voltages to confine a single charge per quantum dot, clearly
challenging scalability. Here, we tune these gate voltages and equalize them
solely through the temporary application of stress voltages. In a double
quantum dot, we reach a stable (1,1) charge state at identical and
predetermined plunger gate voltage and for various interdot couplings. Applying
our findings, we tune a 2$times$2 quadruple quantum dot such that the
(1,1,1,1) charge state is reached when all plunger gates are set to 1 V. The
ability to define required gate voltages may relax requirements on control
electronics and operations for spin qubit devices, providing means to advance
quantum hardware.
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