
Japanese specialists from the research agency RIKEN, together with Fujitsu, have introduced one of the world’s largest superconducting quantum computers. The new system contains 256 qubits — a record in qubit density: the number of qubits was increased fourfold without enlarging the device’s size.
Key features:
Utilizes a 3D architecture based on 4-qubit cells
Operating temperature: 20 mK (close to absolute zero)
Amplifier energy consumption reduced by more than 60%
High density of cable connections
Fujitsu plans to create a 1000-qubit quantum computer by 2026. In the long term, the industry aims for systems with a million qubits, which are necessary for solving real-world problems such as cryptanalysis and new material simulations.
Today, the new 256-qubit system is already accessible via a cloud platform. Among the first users are companies from Japan’s financial and chemical sectors. International cooperation is expected to expand.
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