Japanese scientists have launched the first quantum computer based on neutral atoms: a breakthrough or the start of a race?

Japan has officially joined the elite club of countries developing their own quantum computing systems. The Institute for Molecular Science has unveiled the Shunkai system — the country's first fully functional quantum computer operating on neutral atoms. This is not just an experimental setup, but a working prototype that already operates with approximately 50 qubits from the start.

The architecture of the solution is of particular interest. Instead of the familiar superconducting circuits that dominate IBM and Google's developments, this uses neutral atom technology. This approach is considered more flexible for scaling: qubits are physically held in optical traps, which simplifies their rearrangement and connection into complex computational circuits.

The project's key partner is Infleqtion, which provided the quantum processor. Based on the stated plans, this is a strategic collaboration for years to come. By March 2031, the developers intend to create a fault-tolerant system with 10,000 physical qubits and full error correction. This is an ambitious goal, given that even market leaders are still far from such figures in practical terms.

It is telling that Japan is betting on neutral atoms rather than competing technologies. This may indicate an attempt to bypass the limitations of superconductors, where maintaining coherence becomes difficult as the number of qubits increases. If the plan for 500 qubits is realized in the coming years, the country will gain a serious tool for materials modeling, cryptography, and optimization problems.

However, the gap from the current 50 qubits to the stated 10,000 is enormous. Each scaling stage carries risks of increased errors and management complexity. Nevertheless, the very fact of Shunkai's launch is a clear signal: Asia is strengthening its position in the quantum race, and betting solely on the American or European schools would be a mistake.

My view: the shift to neutral atoms is not just an alternative, but a potential technological breakthrough. If the Japanese manage to maintain momentum and solve the error correction problem, by the early 2030s we could see the first truly commercially useful quantum machine, which would radically change the balance of power in the industry.