The supply chain for today's quantum prototypes is globally distributed. The true geopolitical prize is to control the future, at-scale manufacturing ecosystem for fault-tolerant quantum computers—an arena where no nation currently has a decisive advantage.
Unlike the monolithic semiconductor industry, quantum computing encompasses varied approaches like superconducting, atomic, and photonic systems. Each has a distinct, partially overlapping supply chain, making a unified industrial policy incredibly difficult to formulate and execute.
With ~90 hardware firms pursuing varied, competing qubit modalities, quantum is analogous to biotech's diverse approaches to curing a disease. This differs sharply from the consolidated, single-paradigm semiconductor industry and requires a different mindset for investment and policy.
The narrative of China pursuing a single quantum pathway is outdated. Prominent Chinese academics are now founding private startups across multiple modalities, including neutral atoms and photonics, mirroring the diverse, competitive ecosystem of the West and signaling a more resilient national strategy.
The rare Helium-3 isotope, critical for the dilution refrigerators used in some quantum computers, is primarily sourced from the decay of tritium within the US nuclear weapons stockpile. This creates a non-obvious link between national defense infrastructure and cutting-edge technology development.
After the US and its partners placed export controls on dilution refrigerators, China rapidly mobilized to build its own. Within a few years, it created more domestic firms in this critical space than the rest of the world combined, accelerating its path to self-sufficiency.
Chinese quantum components, like wiring trees for cryostats, can cost one-tenth of US equivalents. Banning them for security reasons would force US research labs to buy ten times fewer components, directly hindering their ability to run experiments and innovate quickly.
Dilution refrigerators for superconducting qubits can take 40 hours to cool, limiting researchers to one experiment per week. An innovation that cuts this time to 12 hours would enable daily experiments, dramatically accelerating a nation's R&D progress and creating a powerful strategic advantage.
China's heavy investment in quantum component manufacturing, like photonic integrated circuits (PICs), allows its researchers to go from idea to physical prototype in just two weeks. In the US, the same process can take 12-18 months, giving China a massive advantage in iteration speed and adaptability.