Fujitsu and RIKEN, a prominent Japanese research institute, have unveiled a new 256-qubit superconducting quantum computer, marking a major advancement in quantum computing.

Located at the RIKEN RQC-FUJITSU Collaboration Center, the new machine is designed with high-density techniques, building on a previous model with 64 qubits. However, this increase will allow more complex molecule analysis and improved error correction algorithms.

Unlike its predecessors, this quantum computer will not be exclusive to Fujitsu and RIKEN. Both organisations plan to grant access to global companies and research institutes in the first quarter of fiscal 2025, enabling further innovation across various fields.

Alongside the qubit expansion, the teams have developed a breakthrough in cooling technology, using a dilution refrigerator with advanced thermal design to maintain efficiency.

Fujitsu and RIKEN also aim to enhance the platform's usability by allowing seamless interaction between quantum and classical computers. This will enable users to run hybrid quantum-classical algorithms.

Looking ahead, the two organisations are working on a 1,000-qubit quantum computer, set to be installed next year, and have agreed to continue their partnership until 2029 to foster ongoing development.

While the 256-qubit computer does not yet compete with machines boasting over 1,000 qubits, it represents a crucial step in exploring diverse quantum computing approaches, as some may fail to scale effectively for practical use.

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