China launches mass production of silicon-28: a breakthrough for quantum computing
China National Nuclear Corporation (CNNC) has officially announced the start of mass production of silicon-28 isotope with a record purity level above 99.99%. This event marks the first time in the country's history that this material has been independently produced on a large scale.
Why Silicon-28 Is Critically Important for Quantum Technologies
Silicon-28 is an isotopically pure form of silicon, free from impurities of the silicon-29 isotope, which creates magnetic noise. In the context of quantum computing, this is crucial: it is silicon-29, with its nuclear spin, that causes qubit decoherence in silicon quantum processors. Using silicon-28 significantly reduces the level of magnetic interference, directly enhancing qubit stability and coherence time — a key parameter for building scalable quantum systems.
Geopolitical Context and Impact on the Industry
This move by Beijing is not just a scientific achievement but a strategic step in the global quantum technology race. Until now, the production of ultra-pure silicon-28 was monopolized by a few Western companies, creating dependency for Chinese research groups and startups. By launching its own mass production, China not only ensures technological sovereignty but also has the potential to dampen prices for this critical material on the global market.
Analytical Commentary: For the crypto industry and blockchain sector, this event has long-term significance. Quantum computers built on stable silicon-28 qubits represent both a threat (to public-key cryptography) and an opportunity (for developing quantum-resistant algorithms). The acceleration of China's quantum computing program means the industry should more actively prepare for the transition to post-quantum cryptography — the time horizon for a practical threat could shrink to 5–7 years.