Fujitsu Riken unveil 256qubit quantum computer

Riken, the renowned research center in Japan, has achieved a significant milestone in the field of quantum computing by successfully scaling up its 64-qubit superconducting quantum computer to a powerful 256-qubit machine, all within the same compact footprint. This remarkable advancement is a crucial step towards the ultimate goal of developing a quantum computer with 1000 qubits by the upcoming year.

Utilizing four of the existing 64-bit superconducting quantum processors manufactured by Fujitsu, Riken integrated these cutting-edge components with a sophisticated 3D interconnect technology. This innovative approach allowed the four chips and interconnect to be housed within the same dilution fridge as the previous iteration of the quantum computer, showcasing efficient use of space and resources.

The successful scaling up of the quantum computer system by Riken and Fujitsu represents a significant breakthrough in overcoming the challenges associated with expanding quantum computing capabilities. This advancement not only enables the implementation of advanced error correction algorithms but also paves the way for the development and demonstration of more complex quantum computing functionalities.

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Looking ahead, both Riken and Fujitsu are poised to offer the 256-qubit superconducting quantum computer as part of a hybrid quantum computing system to cater to the needs of companies and research institutions worldwide. The collaborative efforts between the two entities extend beyond the current project, with plans in place to continue their partnership until 2029.

Furthermore, the next phase of development for the quantum computer system will focus on leveraging its enhanced capabilities to explore more sophisticated hybrid algorithms. These algorithms aim to harness the strengths of both quantum and classical high-performance computing systems, unlocking new possibilities for solving complex computational problems.

The successful implementation of the 256-qubit superconducting quantum computer by Fujitsu and Riken marks a significant technological achievement, overcoming critical technical challenges along the way. Notably, the efficient cooling of the quantum processor within the dilution refrigerator was made possible through the integration of high-density components and state-of-the-art thermal design techniques.