Toward Scalable Fault-Tolerant Quantum Computing: Devices, Architectures, and Applications

上午 10:00 - 上午 10:30

Quantum computing has the potential to address complex societal and industrial challenges beyond the reach of conventional computing. Fujitsu is pursuing an integrated research and development program across quantum devices, platforms, software, algorithms, and applications, in collaboration with leading research institutions.

In superconducting quantum computing, Fujitsu and RIKEN have developed and operated increasingly large systems, including a 64-qubit machine launched in 2023 and a 256-qubit system in 2025, demonstrating scalability toward a 1024-qubit system planned for 2026. In parallel, Fujitsu and TU Delft are advancing diamond-spin qubit technology based on tin-vacancy centers in diamond and nearby 13C nuclear spins. Photonic interconnects between spin qubits offer flexible connectivity and may enable quantum error-correction schemes with reduced overhead.

Fujitsu is also collaborating with the University of Osaka on software technologies for fault-tolerant quantum computing, including quantum error correction and logical gate operations. Through this collaboration, we have developed the STAR architecture, a partially fault-tolerant architecture that can reduce the physical-qubit and gate-operation requirements for practical quantum computation. We are also developing the Quantum Application Research Package (QARP) for quantum algorithms and applications, and have begun providing a beta version to collaborators. This presentation outlines Fujitsu’s integrated approach to scalable and useful quantum computing.

Featured Speakers

Shintaro Sato

Dr. Shintaro Sato

Fellow, Head of Quantum Laboratory, Fujitsu Research, Fujitsu Limited

Shintaro Sato is Fellow and Head of Quantum Laboratory at Fujitsu Research, Fujitsu Limited in Japan. He also holds a concurrent position as Deputy Director of the RIKEN RQC-Fujitsu Collaboration Center at RIKEN. His responsibilities at Fujitsu include leading research on all technology layers of quantum computing: quantum devices, platforms, software, and applications. Prior to his work in quantum computing, he conducted research and development on post-silicon devices using carbon nanotubes and two-dimensional materials. He holds a Ph.D. in Mechanical Engineering from University of Minnesota, USA, and an MS in Science and Engineering (Physics) from University of Tsukuba, Japan. His research areas include quantum computing, nanoelectronics, and nanomaterials. He is also Fellow of the Japan Society of Applied Physics.