China Achieves High-Purity Silicon-28 for Quantum Computing 2026

China has achieved a significant milestone in quantum technology by producing high-purity silicon-28 for the first time, marking a decisive step toward self-sufficiency in a field where it has relied on foreign innovations. The announcement comes from the China National Nuclear Corporation (CNNC), whose research institute successfully produced the isotope with high abundance, according to state media. This development could reshape the competitive landscape in quantum computing and beyond.

Why Silicon-28 Matters for Quantum Computing

Silicon-28 is a stable isotope of silicon with zero nuclear spin, making it ideal for quantum computing. When used in quantum dots or donor-based qubits, it reduces decoherence and improves coherence times, which are critical for reliable quantum operations. Until now, only a few countries—notably the United States and allies—controlled the production of high-purity silicon-28, giving them a strategic advantage.

China's ability to produce this material domestically reduces its dependence on foreign suppliers and could accelerate its quantum research. The CNNC did not disclose the exact purity level or production scale, but the announcement signals a broader push for technological independence amid ongoing tensions with the US and its allies.

The Global Quantum Race: Where China Stands

China is already a powerhouse in quantum technologies, particularly in quantum telecommunications, where it leads with 34% of the world's most-cited scientific papers, compared to 17% for the US. In quantum computing, however, the US holds the edge with 34% of highly cited articles versus China's 16%.

The patent landscape reflects this duality. China accounts for about 60% of all global quantum technology patent applications filed in 2024, but when it comes to international patents—those protected in multiple countries—the US leads with 48% versus China's 11%. This gap highlights China's relative weakness in securing global intellectual property, even as it dominates in volume.

Strategic Implications of China's Silicon-28 Breakthrough

The production of high-purity silicon-28 is more than a scientific achievement; it's a strategic move. By securing a domestic supply of this critical material, China can insulate its quantum research from export controls and sanctions. The US has increasingly restricted exports of advanced technologies to China, including quantum-related components, making self-sufficiency a priority for Beijing.

Moreover, this breakthrough could bolster China's position in the global quantum supply chain. If China can produce high-purity silicon-28 at scale, it may become a supplier to other nations, challenging the current dominance of Western suppliers. However, the CNNC has not yet indicated whether it plans to commercialize the material or keep it for domestic use.

Challenges Ahead

Despite this progress, China still faces hurdles. Producing high-purity silicon-28 is one thing; integrating it into reliable quantum devices is another. The country needs to develop advanced fabrication techniques and scale up production while maintaining quality. Additionally, China's reliance on foreign expertise in certain quantum computing areas remains a vulnerability.

The global quantum race is also intensifying. The US, EU, and other allies are investing heavily in quantum research and development, and they may respond to China's breakthrough with further restrictions or accelerated innovation. The outcome will depend on how quickly China can translate this material advantage into practical quantum computers. The background to this story is set out in PsiQuantum's Photonic Quantum Computer: A Leap Toward Fault Tolerance. A related thread runs through Quantum Computing Finds Nine Solutions for Nuclear Fusion Fuel. Earlier coverage in Leap forward in quantum computing shows how the argument developed.

What to Watch Next

Look for announcements from Chinese research institutions about quantum computing milestones using domestically produced silicon-28. Also, monitor whether China begins to export the material or restricts its own exports as a countermeasure. Finally, watch how the US and its allies adjust their quantum strategies in response to China's growing self-sufficiency. A closer look at the same subject appears in China's 110-Meter Qitai Radio Telescope Achieves Extreme Precision. Anyone following the wider picture can start with UK's Incoherent China Approach Plagued by Expertise Gap. The same theme surfaces in Technology: latest articles, which takes a different angle.

The CNNC's achievement is a clear signal that China is determined to lead in quantum technologies, and it has the resources and resolve to overcome bottlenecks. For businesses and governments, this means the quantum landscape is becoming more multipolar, with China as a formidable player. Context on how this played out before sits in China's Origin Wukong Quantum Platform Adds Cyber Defense. A companion piece, China Achieves High-Purity Silicon-28 for Quantum Computing, approaches the same subject from another angle.

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