SMRTR TechAug 25, 2026Interesting Engineering

First 50-qubit neutral-atom quantum computer goes live in Japan with US-made QPU

SMRTR summary

Japan has switched on Shunkai, its first operational full-stack neutral-atom quantum computer, starting with 50 qubits and eventually scaling to 500. Built by researcher Kenji Ohmori and powered by a QPU from Colorado-based Infleqtion, the system supports Japan's government goal of achieving fault-tolerant quantum computing by 2050. Future plans include expanding to 10,000 qubits and opening access to outside researchers and industry.

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