Sydney-based quantum computing company  Diraq has achieved a record control accuracy of 99.9% in a quantum processor using industry-standard silicon wafers. The device comprises a silicon spin qubit made in a 300 mm foundry environment using standard CMOS materials and processes.

The device allows for sophisticated qubit control and measurement techniques, including real-time feedback, optimized qubit initialization, control voltage pulse shaping, and advanced analysis tools such as gate set tomography (GST) and randomized benchmarking.

Diraq claims that the high fidelity of the qubit device paves the way for integrating high-quality qubits with standard CMOS transistors on a single chip, which is crucial for developing commercially viable, error-corrected quantum computers with millions of qubits. The company intends to leverage existing semiconductor foundry capabilities to develop quantum processor chips on a large scale. In connection with this, GlobalFoundries will manufacture a sample batch of Diraq’s chips later this year.