Diraq Achieves 99 Percent Fidelity in Two-Qubit Gate Operations

In a significant breakthrough, Diraq, a global leader in quantum computing based on silicon CMOS quantum dots, has successfully demonstrated consistent and repeatable operation with above 99% fidelity of two-qubit gates in their SiMOS (silicon metal-oxide-semiconductor) quantum dot platform. This milestone achievement represents the first silicon-CMOS based platform to reach this level of accuracy for two-qubit logic.

According to Founder and CEO Andrew Dzurak, this breakthrough underpins the process for securing consistent and reliable performance in their SiMOS quantum dot qubits, paving the way for realizing more reliable silicon-based quantum devices. The research, led by Tuomo Tanttu and colleagues, identified strategies for improving high-fidelity operations through careful implementation of gate recalibration, informed choice of physical materials, and pulse engineering. This achievement sends a positive signal that solid-state qubits, such as Diraq’s CMOS quantum dots, continue to demonstrate clear advantages in terms of scalability and cost-efficiency.

Advancements in Silicon-Based Quantum Computing: Diraq’s Breakthrough

Diraq, a pioneer in the field of silicon-based quantum computing, has made a significant breakthrough by achieving an accuracy of above 99% for two-qubit gates in their SiMOS (silicon metal-oxide-semiconductor) quantum dot platform. This milestone marks a crucial step towards the development of reliable and scalable quantum devices.

The achievement is a testament to Diraq’s commitment to driving innovation in the field of quantum computing. The company’s focus on silicon-based quantum dots, which are compatible with mass manufacturing techniques used for today’s silicon chips, promises scalability and cost-efficiency. This breakthrough sends a positive signal that solid-state qubits, such as Diraq’s CMOS quantum dots, continue to demonstrate clear advantages in the pursuit of reliable and efficient quantum computing.

Technical Breakthrough: Strategies for Improving High-Fidelity Operations

The technical breakthrough is detailed in a study published in the journal Nature Physics. The research, led by Tuomo Tanttu and colleagues, identified strategies for improving high-fidelity operations. The study yielded evidence for the systematic improvement of the robustness, consistency, and reliability of entangling gate fidelities by employing a careful and considered implementation of gate recalibration combined with an informed choice of physical materials and pulse engineering.

The analysis included a review of error correction code performance, identifying the causes of qubit degradation and insights into their physical mechanisms. The team also demonstrated the operational parameters of statistical characteristics and temporal stability using multiple validation methods. This comprehensive approach ensured that the team captured the variation and most common error types on pairs of qubits, including slow nuclear and electrical noise as well as contextual noise.

Understanding Noise Sources: A Critical Element in Maintaining Performance

Identifying and understanding noise sources is crucial in maintaining performance within tolerance and informs future decisions regarding device manufacture. The research highlighted opportunities for innovative control solutions that can be developed to enhance the overall accuracy and efficiencies as silicon spin-based qubits are scaled up into full-scale, error-corrected quantum processors.

One of the physical factors that influences the variability in qubit performance and degradation is due to the inevitable imperfections present in physical materials and components. The team’s rigorous testing and analysis of their CMOS quantum dot qubits have shed light on these noise sources, paving the way for the development of more reliable and efficient quantum devices.

Leadership in Silicon Quantum Computing: Diraq’s Approach

Diraq’s approach to silicon-based quantum computing is characterized by a deep scientific understanding, combined with technical excellence. The company’s commitment to rigorous testing and analysis has enabled them to reach significant milestones, including the achievement of above 99% fidelity for two-qubit gates.

Andrew Dzurak, Founder and CEO of Diraq, emphasized the importance of this approach, stating that “it is only through the rigorous and comprehensive testing and analysis of our CMOS quantum dot qubits that we will reach our technical and performance milestones, and ultimately achieve a fully error-corrected quantum computing system ahead of our competitors.”