IMS Launches Japan’s First Full-Stack Neutral-Atom Quantum Computer

Shunkai distinguishes itself from traditional superconducting quantum computers by utilizing individual atoms as qubits, manipulated by laser-based optical tweezers. This architecture allows researchers to dynamically reconfigure qubit arrays and maintain quantum entanglement between arbitrary particles. Because the system operates at room temperature without the need for complex refrigeration, it offers a distinct path toward overcoming the scalability hurdles currently facing the industry.

The project, supported by the Cabinet Office’s Moonshot Research and Development Program, integrates software expertise from Hitachi and hardware processing units from Infleqtion. Initially deploying with 50 qubits, the team plans to scale the system to 500 qubits while opening access to external collaborators for error-correction testing and application development. Professor Ohmori envisions integrating Shunkai with existing supercomputing facilities to create a hybrid quantum-GPU environment.

Named after the Edo-period astronomer Harumi Shibukawa, the machine is designed to mirror the precision of early celestial calculations. The research team aims to reach a milestone of 10,000 physical qubits with integrated error correction by March 2031. This roadmap positions the IMS as a central hub for fault-tolerant computing, bridging the gap between theoretical physics and industrial implementation.