Diraq has achieved a significant milestone by demonstrating consistent and repeatable operation with above 99% fidelity of two-qubit gates in their SiMOS (silicon metal-oxide-semiconductor) quantum dot platform. This achievement is crucial for the reliability and consistency of multi-qubit systems and represents the first silicon-CMOS based platform to reach this milestone. The breakthrough paves the way for more reliable silicon-based quantum devices and highlights the advantages of solid-state qubits, such as compatibility with mass manufacturing techniques, scalability, and cost-efficiency.
The technical breakthrough, detailed in a study published in Nature Physics, involved strategies for improving high-fidelity operations, error correction, and understanding noise sources. The research focused on measuring sustained performance and analyzing physical errors and fidelities through extensive testing. This rigorous approach supports the development of scalable, high-fidelity control strategies for silicon spin-based qubits.
Although a few other researchers have also been able to achieve more than 99% two-qubit gate fidelities, they all were based upon other modalities. This demonstration is the first one we know about that was achieved using quantum dots. Because quantum dot technology is built using standard semiconductor technology, it has a potential to scale quite rapidly provided the fidelities don’t decrease as the qubit count gets larger. A quantum computer that combines both attributes could represent a very interesting device.
Founder and CEO Andrew Dzurak emphasized that reaching the 99% two-qubit fidelity milestone underpins the process for securing consistent and reliable performance in their SiMOS quantum dot qubits and supports their focus on scaling up to full-scale fault-tolerant quantum processors.
Diraq has posted a press release about this achievement on their website that can be found here. And the full technical paper about this development is available on the Nature website here.
August 23, 2024
