Quantinuum Upgrades RIKEN's Quantum Computing with H2 System in Japan
Quantinuum has supplied its H2 quantum computer to RIKEN, enhancing the Reimei-Fugaku hybrid supercomputer platform. This upgrade is expected to improve research capabilities in pharmaceuticals and materials science, advancing complex scientific discoveries.

Quantinuum's delivery of the H2 quantum computer marks a significant upgrade for RIKEN's Reimei-Fugaku platform, which combines the Reimei quantum system and Fugaku supercomputer. The H2 system, featuring 56 qubits, is designed for high-fidelity operations, enabling larger workloads and faster solutions.
This enhancement builds on the success of the previous System Model H1, which has facilitated significant research outcomes since its installation in February 2025. The integration of quantum computing with high-performance computing (HPC) allows researchers to tackle complex molecular simulations, advancing studies in chemistry and materials science. As hybrid computing continues to evolve, the partnership between Quantinuum and RIKEN positions Japan at the forefront of quantum-HPC innovations.




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