Fujitsu has revealed a prototype quantum computer using diamond spin qubits, aiming for scalability and a multi-module version by 2027.
Fujitsu has unveiled a prototype quantum computer that utilizes diamond spin qubits, with plans to enhance its scalability through photonic connections. The company aims to develop a multi-module system by 2027.
Innovative Quantum Architecture
The prototype leverages tin-vacancy (SnV) centers within diamond as qubits, integrated with photonic circuits to read quantum states optically. Operating at around −271.6 °C, this system functions slightly warmer than traditional superconducting quantum computers, which typically operate near absolute zero.
Fujitsu's Hybrid Quantum Computing Platform facilitates user interaction without requiring deep knowledge of the hardware. The company asserts that this is the first operational quantum computer of its type that combines SnV centers with photonic integration.
Scalability Through Photonic Connections
A key advantage of this design is the ability to connect individual quantum modules via light, which could lead to larger systems built from smaller components instead of a single bulky device. The choice of SnV centers over the more commonly used NV centers is based on their structural symmetry and reduced sensitivity to external noise, enhancing performance.
Fujitsu has also innovated techniques to bond diamond with various materials and significantly reduce the diamond layer thickness, which is crucial for integrating with photonic circuits.
Future Developments
Looking ahead, Fujitsu intends to create a multi-module quantum computer by 2027 and is also exploring the integration of diamond with superconducting technologies. This prototype is a result of collaborative efforts with Delft University of Technology and the QuTech research center, supported by the Dutch program Holland High Tech.
Fujitsu's long-term vision includes achieving 250 logical qubits by 2030 and 1000 logical qubits by 2035, as part of its technological roadmap.
