This new system builds on the previously launched 64-qubit model from October 2023, which was supported by Japan’s Ministry of Education, Culture, Sports, Science and Technology (MEXT). The 256-qubit quantum computer aims to enhance computational capabilities for complex challenges, including the analysis of larger molecules and the implementation of error correction algorithms.

The system features a scalable 3D connection structure that allows for efficient qubit scaling and has achieved quadrupled implementation density within the dilution refrigerator, enabling it to operate alongside the 64-qubit system. Fujitsu and RIKEN plan to make this technology available to global companies and research institutions with a focus on facilitating collaboration between quantum and classical computing.

In future developments, Fujitsu and RIKEN are working towards a 1,000-qubit computer scheduled for installation in 2026 and have extended the installation period of their Collaboration Center to 2029 to support ongoing research and development for larger superconducting quantum computers.

Want to read more? You can find the full press release here.