Fujitsu Begins Development of 10,000+ Qubit Quantum Computer Targeting 2030 Completion

Fujitsu’s technological development priorities centre on scaling quantum computing capabilities towards practical application. The company is actively pursuing a 10,000-qubit superconducting quantum computer, targeted for completion in fiscal 2030, incorporating its internally developed “STAR” architecture – an early-stage fault-tolerant quantum computing (early-FTQC) design. This architecture, demonstrated through simulations, is projected to execute complex material energy estimation calculations – a task requiring five years on conventional computers – within approximately ten hours using 60,000 qubits.

Key to achieving this scale is focused research across several critical areas. High-throughput, high-precision qubit manufacturing technology is paramount, with efforts concentrated on improving the manufacturing precision of Josephson Junctions – essential components of superconducting qubits – to minimise frequency variations. Simultaneously, Fujitsu is developing chip-to-chip interconnect technology, encompassing advanced wiring and packaging techniques to facilitate the interconnection of multiple qubit chips and the creation of larger quantum processors. Addressing the practical challenges of cryogenic cooling and control systems is also a priority, with research directed towards high-density packaging and low-cost qubit control methods, including techniques to reduce component count and heat dissipation.

Furthermore, the development of robust decoding technology for quantum error correction is being actively pursued, encompassing both algorithmic advancements and system design innovations to accurately decode measurement data and correct errors inherent in quantum computations. Beyond solely superconducting qubits, Fujitsu is also investigating the integration of diamond spin-based qubits, leveraging light for qubit connectivity, and collaborating with institutions such as Delft University of Technology and QuTech to enhance qubit accuracy and controllability. The company anticipates achieving a 250-logical qubit machine by 2030 and a 1,000-logical qubit system by 2035, potentially utilising multiple interconnected qubit chips.

Technology development focus areas

Fujitsu’s research efforts will focus on developing the following scaling technologies.

• High-throughput, high-precision qubit manufacturing technology. This includes the improvement of the manufacturing precision of Josephson Junctions. They are critical components of superconducting qubits, which minimize frequency variations.
• Chip-to-chip interconnect technology: This involves the development of wiring and packaging technologies. These enable the interconnection of multiple qubit chips. This development facilitates the creation of larger quantum processors.
• High-density packaging and low-cost qubit control. It addresses the challenges associated with cryogenic cooling and control systems. This includes the development of techniques to reduce component count and heat dissipation.
• Decoding technology for quantum error correction: This involves the development of algorithms. It also includes system designs for decoding measurement data. These advancements help in correcting errors in quantum computations.