Silicon Spin Qubit Array Achieves Eight Qubit Milestone

Imec and Diraq recently achieved a significant technical milestone by demonstrating the successful operation and readout of an eight-qubit silicon spin array. This development uses standard 300mm CMOS-compatible technology, which is the foundation of modern semiconductor manufacturing. The achievement proves that quantum processors can scale while maintaining the necessary control.

Scaling Quantum Hardware with Silicon Technology

The collaboration between imec and Diraq focuses on using silicon MOS spin qubits to build the next generation of computers. Silicon spin qubits are a top choice for researchers because they fit within the existing semiconductor ecosystem. Using the same factories that build smartphone chips allows engineers to use established supply chains and expertise.

This latest experiment successfully operated an eight-qubit linear array. Previously, research focused on individual qubits or small pairs to prove the concept. This new result shows that expanding the number of qubits does not automatically lead to a loss of coherence. Maintaining coherence is vital because it determines how long a quantum state remains stable enough for calculations.

The manufacturing process used a 300mm silicon spin-qubit platform. Imec spent nearly a decade optimizing this specific engineering path to ensure it meets industrial standards. By bridging the gap between small laboratory setups and large-scale factory production, the teams are moving closer to a practical quantum processor.

Efficient Readout Architectures

A major challenge in quantum scaling involves the management of wires and sensors. As an array grows, the hardware required to read the state of each qubit often becomes overwhelming. This creates heat and takes up too much physical space within the cooling systems.

The eight-qubit demonstration proved that the readout architecture can scale favorably. The team managed to increase the qubit count without a proportional increase in the number of sensors. This keeps the wiring density low and prevents excessive thermal loads on the system. Such efficiency is necessary for building processors with thousands or millions of qubits in the future.

Industrial Manufacturing Standards

The use of CMOS-compatible processes ensures that every chip produced meets high standards for yield and reproducibility. In the semiconductor world, yield refers to the percentage of functional chips on a single wafer. High yields are mandatory for making quantum computing commercially viable.

By sticking to 300mm wafer technology, the researchers ensure their designs are ready for mass production. This avoids the need to invent entirely new manufacturing tools, which would cost billions of dollars and take decades. Instead, they are adapting the most advanced tools already available in the world today.

Advancing Beyond Qubit Pairs

Previous milestones reached in 2025 demonstrated that silicon spin qubits could achieve the high fidelity levels needed for error correction. Error correction is a process that allows quantum computers to fix mistakes that happen during calculations. Without it, a quantum computer cannot solve complex real-world problems reliably.

While those earlier tests proved that the building blocks worked, this new eight-qubit array proves the blocks can be assembled into larger structures. The ability to control eight qubits simultaneously without interference shows that the underlying physics is sound. It provides a blueprint for even larger arrays that will eventually form a complete system.

The integration of quantum device engineering with advanced semiconductor process technology is a rare combination. Most quantum startups struggle to move beyond specialized laboratory environments. By working with an established innovation hub like imec, Diraq can test their designs on equipment that is identical to what the world’s largest chipmakers use.

Maintaining Coherence at Scale

The research paper published in Nature Communications highlights that the eight-qubit device did not suffer from performance degradation. Often, when more components are added to a chip, noise increases and performance drops. The fact that coherence remained stable is a major win for the engineering team.

This stability allows for more complex gate operations. In a quantum computer, gates are the logic operations that perform the actual math. If a system can handle eight qubits at once, it can run more sophisticated algorithms than a two-qubit system. This progress is essential for reaching the stage where quantum computers outperform classical supercomputers.

Future Path to Utility Scale

Utility scale refers to the point where a quantum computer provides a clear advantage for industrial or scientific tasks. Achieving this requires a steady cadence of technical updates. The jump from two qubits to eight qubits in less than a year shows that the development cycle is accelerating.

The teams expect to keep this pace as they move toward dozens and then hundreds of qubits. Because they use a linear array, they can continue to extend the design across the silicon surface. This modular approach is a hallmark of successful semiconductor design and will be the key to future success.

Industrial Pathways and Global Impact

The founder of Diraq emphasized that this progress represents a clear industrial pathway for the technology. Using the same 300mm CMOS platform for different generations of chips proves the reliability of the process. It removes the uncertainty that often plagues new technologies by providing a stable foundation for growth.

The semiconductor industry is already geared toward shrinking components and increasing density. This matches the needs of quantum computing perfectly. As the industry continues to advance, the quantum chips built on these platforms will benefit from every new breakthrough in traditional chipmaking.

The collaboration shows that the infrastructure for the quantum age is already being built. It is not just about the physics of a single atom or electron. It is about how to manufacture those components by the millions with perfect precision. This successful demonstration of an eight-qubit array is the evidence that the strategy is working.

Engineering for Reliability

Reliability is the most important factor for any IT manager or developer considering quantum solutions. A system that only works under perfect conditions in a lab is not useful for business applications. By using imec’s advanced technology, these qubits are built to be part of a reliable, repeatable system.

The engineering team spent years focusing on the interface between the silicon and the control electronics. This work ensures that signals sent to the qubits are clean and precise. Without this level of engineering, scaling to eight qubits would have resulted in too much noise for the system to function.

The Role of Research Hubs

Innovation hubs like imec play a critical role in this ecosystem. They provide the expensive machinery and cleanroom environments that individual companies might not be able to afford. This allows for a collaborative environment where theoretical designs from companies like Diraq can be tested against the realities of modern manufacturing.

This partnership model accelerates the transition from academic theory to practical hardware. It ensures that the transition to quantum computing is an evolution of current technology rather than a total replacement. By building on what already works, the industry minimizes risk and speeds up the time to market for these powerful new machines.

Conclusion of the Eight Qubit Test

The demonstration of the eight-qubit array is more than just a higher number. It is a validation of the entire manufacturing philosophy. It proves that silicon spin qubits are not just a laboratory curiosity but a viable path for the future of the computer industry.

The data gathered from this test will inform the design of the next generation of chips. Engineers now have a better understanding of how these arrays behave as they grow. This knowledge is essential for designing the control systems and software that will eventually run on these processors.

The world is watching as these milestones are reached. Every successful test brings the industry closer to the day when quantum computing becomes a standard tool for solving the world’s most difficult problems. With the support of industrial manufacturing, that day is arriving faster than many expected.