China launches mass production of ultra-pure silicon-28: a breakthrough for quantum computing
China National Nuclear Corporation (CNNC) has announced the launch of serial production of silicon-28 with isotopic purity exceeding 99.99%. This is the first time in the country's history that large-scale, fully independent production of this material has been organized.
Silicon-28 is an isotope of silicon that plays a critical role in the development of silicon-based quantum computers. Its key advantage is that it is virtually free of nuclear spins, which create magnetic interference. In standard silicon, the presence of the silicon-29 isotope (which possesses a nuclear spin) leads to decoherence — the loss of the quantum state of qubits. Using ultra-pure silicon-28 radically reduces noise levels, allowing qubits to remain stable for significantly longer.
Achieving isotopic purity of 99.99% is not just a number. It is a threshold value at which qubit coherence time increases by orders of magnitude, making it possible to create practical, scalable quantum processors. Previously, such materials were only available in laboratory quantities or through limited foreign supplies. Now China is removing this dependency, which is strategically important for its national quantum technology program.
From a fundamental science perspective, this step can be compared to the transition from experimental samples to industrial chips. However, for the crypto industry, the implications are even deeper. Quantum computers pose an existential threat to the public-key cryptography on which Bitcoin, Ethereum, and all modern blockchains are based. Mass production of a key component for stable quantum systems brings closer the moment when 2048-bit RSA keys could be cracked in minutes.
This does not mean that all wallets will be compromised tomorrow. There is still a long way to go before a full-fledged quantum computer with millions of qubits is created. But progress in materials science, like this, compresses the timeline. For investors and developers, this is a signal: the transition to post-quantum cryptography (e.g., lattice-based schemes or hash-based signatures) ceases to be an academic exercise and becomes a matter of network survival.
My analysis: This breakthrough by CNNC is not just a technological novelty, but a clear indicator that the quantum supremacy race has entered an industrial phase. For the crypto community, it is time to take the threat of "Q-Day" — the day when a quantum computer breaks modern cryptography — seriously. The market needs not hype-driven tokens, but working solutions for quantum-resistant blockchains.