RIKEN Demonstrates High-Fidelity Simultaneous Control of Silicon Spin Qubits Above 99.9% Threshold

Researchers at RIKEN and collaborators have achieved high-fidelity simultaneous control of five silicon spin qubits, maintaining over 99.9% accuracy. They overcame crosstalk caused by AC-Stark shifts through a new calibration protocol, enabling the use of a single microwave control line. This breakthrough meets the fault-tolerant threshold for quantum error correction and paves the way for more scalable quantum computers. The post RIKEN Demonstrates High-Fidelity Simultaneous Control of Silicon