Japan has made a significant step in the race for quantum supremacy. The Institute for Molecular Science has officially commissioned Shunkai — the country's first fully functional quantum system operating on neutral atoms. This event marks an important milestone not only for national science but also for the entire global quantum computing industry.
Technical details and ambitious plans
At the initial stage, Shunkai operates with an array of approximately 50 qubits. However, the system's architecture was initially designed with scalability in mind — the capability to expand to 500 qubits is already built in. A key component is the processor from Infleqtion, one of the recognized leaders in neutral-atom quantum technology.
The developers' roadmap deserves special attention. By March 2031, they intend to create a fault-tolerant system based on this technology, capable of operating 10,000 physical qubits with full error correction. Such a leap in performance could radically transform the landscape in areas such as cryptography, materials science, and the optimization of complex financial models.
Analyst's perspective
The choice of neutral-atom technology is no coincidence. Unlike superconducting qubits, which require extremely low temperatures and complex infrastructure, atomic systems offer higher coherence and are potentially easier to scale. However, the path from 50 qubits to 10,000 is not merely a quantitative increase; it is a qualitative transition toward solving problems of decoherence and operational precision. I believe that Shunkai's success will serve as an indicator of whether Japan can take a leading position in this critically important technology, which in the long term has the potential to undermine the foundations of modern asymmetric cryptography.