Large-scale characterisation of silicon quantum dot qubits

Current research on spin qubits is focused on several key targets to advance their viability for quantum computing. These include achieving high-fidelity quantum operations, improving coherence times and stability by minimizing the impact of environmental noise and decoherence and scaling up the number of qubits while maintaining the good performance. These developments are essential for developing scalable, robust, and efficient quantum processors based on spin qubits. In this talk we report large-scale characterisation of FDSOI electron and hole quantum dot qubits using cryogenic multiplexer, similar to [1], but that has been fabricated on quantum device dedicated pilot line by SemiQon. With the multiplexing approach thousands of quantum dots can be probed using standard cryostat and measurement methods providing basis for statistical analysis. This interfacing method can be further extended for large-scale control of spin qubits.

[1] H. Bohuslavskyi et al. Scalable on-chip multiplexing of silicon single and double quantum dots. Commun Phys 7, 323 (2024).