Fujitsu and RIKEN Increase Quantum Computing Scale with a 256-Qubit Superconducting System
Case Studies
Fujitsu and RIKEN developed a 256-qubit superconducting quantum computer at the RIKEN RQC-FUJITSU Collaboration Center in Japan, advancing their joint work in superconducting quantum computing. Keysight Quantum Control System (QCS) is embedded within the 256-qubit system as the control layer connecting classical and quantum operations.
Quantum computing is moving from early research systems toward larger platforms that can support advanced scientific computing and algorithmic exploration. As systems scale, researchers need more than additional qubits. They need precise control, reliable readout, and a stronger connection between classical computing infrastructure and quantum processors.
Keysight QCS was selected as the control system embedded within Fujitsu and RIKEN’s 256-qubit quantum computer. QCS provides the conversion layer between classical and quantum operations, supporting the signal generation and acquisition required to control qubits and interpret quantum states. This role makes QCS a core part of the system’s operating environment.