Fujitsu and Yaqumo Begin Hardware Validation of STAR Architecture on Neutral-Atom QPUs

Japanese IT services giant Fujitsu Limited (TSE: 6702) and cold-atom hardware developer Yaqumo Inc. have initiated experimental hardware verification of quantum computing architectures and operational software layers on physical neutral-atom quantum processors. Building on theoretical compatibility studies launched in April 2026, the joint R&D team began executing live circuit benchmarks in August 2026 to accelerate early Fault-Tolerant Quantum Computing (Early-FTQC) platform deployments.

The technical evaluation integrates Fujitsu’s proprietary STAR (Space-Time efficient Analog Rotation) architecture onto Yaqumo’s neutral-atom processor roadmap. Originally engineered to suppress physical qubit overhead in superconducting architectures, the STAR framework minimizes the spatial footprint required for arbitrary-angle phase rotation gates. By leveraging the optical trapping and all-to-all qubit connectivity native to neutral-atom arrays—where ytterbium (Yb) atoms are dynamically manipulated using optical tweezers—the collaboration seeks to evaluate whether STAR compilation can drive higher-fidelity quantum error correction (QEC) with significantly reduced physical qubit counts.

Concurrently, the team is adapting Fujitsu’s open-source middleware, the Open Quantum Toolchain for OPerators and Users, to interface directly with Yaqumo’s control infrastructure. This software stack handles low-level command translation, job queue scheduling, device status monitoring, and pulse calibration for neutral-atom systems. By establishing a unified cloud control interface, the integration enables external enterprise users to execute quantum algorithms across diverse hardware modalities without modifying high-level circuit specifications.

Founded in April 2025, Tokyo-based Yaqumo is advancing a commercial neutral-atom QPU target exceeding several hundred qubits with active quantum error correction by fiscal year 2027. The startup’s hardware roadmap is supported by industrial supply-chain alliances with SCREEN Holdings, Hamamatsu Photonics, and NKT Photonics, as well as capital backing from Toyota Motor Corporation and the government-funded JIC Venture Growth Investments (JIC-VGI).

Review the official press release via Fujitsu Limited here, inspect open-source software tools on GitHub here, and examine our previous analysis of Yaqumo's Industrial Optical Alliances and Cold-Atom QPU Roadmaps here.

September 9, 2026