Fujitsu and RIKEN have unveiled a groundbreaking advancement in the field of quantum computing with the introduction of a 256-qubit superconducting quantum computer. This development represents a significant leap from their previous 64-qubit system, showcasing their commitment to pushing the boundaries of computational capabilities.
The newly unveiled quantum computer, housed at the RIKEN RQC-FUJITSU Collaboration Center, is a result of collaborative efforts to harness cutting-edge technology for enhanced scalability and cooling efficiency. Building upon the foundation laid by the 64-qubit system launched in 2023, this upgrade incorporates high-density implementation techniques to pave the way for more complex modeling and data analysis.
By quadrupling the qubit capacity, from 64 to 256, users can now tackle more demanding computational tasks, opening up avenues for advanced research in diverse fields such as finance, drug discovery, and materials science. This exponential growth in qubit count not only expands the scope of quantum computing applications but also propels the development of error correction algorithms crucial for practical quantum computing.

A spokesperson from Fujitsu emphasized the significance of this achievement, highlighting the strides made towards unlocking the potential of superconducting quantum computers to address complex global challenges. The collaboration between Fujitsu and RIKEN aims to bridge the gap between quantum and classical computing, offering researchers a seamless hybrid platform for efficient execution of algorithms and access to high-performance computing.
Technical innovations in the 256-qubit system include a scalable 3D connection structure that facilitates qubit expansion without the need for extensive redesigns. This architecture, featuring 4-qubit unit cells arranged in a three-dimensional layout, underscores the system’s scalability and adaptability for future advancements.
Moreover, the enhanced implementation density within the dilution refrigerator ensures optimal cooling for the superconducting qubits, enabling the 256-qubit system to operate within the same cooling unit as its predecessor. This meticulous design approach balances heat generation with cooling requirements while maintaining ultra-high vacuum conditions and ultra-low temperatures.

Looking ahead, Fujitsu is committed to accelerating the practical application of quantum computing through hardware and software enhancements. Plans are underway to develop a 1,000-qubit superconducting quantum computer by 2026, signaling a continued focus on advancing quantum capabilities and fostering global collaborations in the field of quantum research.
Noteworthy collaborations with institutions like the Australian National University underscore Fujitsu’s commitment to expanding quantum research ecosystems beyond Japan. The global availability of the 256-qubit system from early fiscal 2025 is poised to stimulate larger-scale quantum experiments and applications, offering a glimpse into the future of quantum computing for industries and research communities worldwide.
In conclusion, the unveiling of the 256-qubit quantum computer marks a significant milestone in the realm of computer technology, signaling a new era of possibilities for quantum computing applications and research endeavors. As Fujitsu and RIKEN continue their quest for practical and scalable quantum solutions, the global tech community eagerly anticipates the transformative impact of quantum computing on various industries and scientific disciplines.
🔗 Reddit Discussions
- TIL Heat causes errors in the qubits that are the building blocks of a quantum computer, so quantum systems are typically kept inside refrigerators that keep the temperature just above absolute zero (-459 degrees Fahrenheit).
- Physicists “turn back time” by returning the state of a quantum computer a fraction of a second into the past, possibly proving the second law of thermodynamics can be violated. The law is related to the idea of the arrow of time that posits the one-way direction of time: from the past to the future
- Finland’s first 5-qubit quantum computer