Fujitsu Limited has developed the world’s first working prototype of a diamond-spin quantum computer integrating tin-vacancy (SnV) centers into photonic integrated circuits, marking a significant breakthrough in scalable quantum architecture. Developed in collaboration with Delft University of Technology and QuTech, the system operates at -271.6°C a higher temperature than conventional superconducting systems and connects directly to the Fujitsu Hybrid Quantum Computing Platform. By leveraging heterogeneous material bonding, diamond-substrate thinning technology, and alumina optical waveguides, the platform extracts single photons emitted during qubit readout, enabling high-fidelity optical interconnections essential for modular scaling. Highlighting the architectural flexibility of the system, Vivek Mahajan, Corporate Executive Officer and CTO at Fujitsu Limited, stated:
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“The diamond-spin approach we have applied in this prototype not only offers exceptional scalability in its own right, but also has the potential to be integrated with superconducting quantum computers to further extend their capabilities, enabling more complex and large-scale computations.” Reaffirming the long-term research partnership driving the achievement, Dr. Kees Eijkel, General Director of QuTech, added: “We are delighted to announce this prototype diamond spin quantum computer as a result of the collaborative research conducted since 2020 between Fujitsu, Delft University of Technology, and QuTech. It is a major milestone in our strong collaboration. Demonstrating the scalability expected of diamond spin quantum computing remains a long and challenging journey. However, by further strengthening our collaboration with Fujitsu, we are committed to tackling this ambitious and meaningful challenge and leading the development of next-generation quantum technologies.” Ultimately, Fujitsu plans to develop a multi-module diamond-spin prototype by 2027 as part of its broader roadmap to realize practical, fault-tolerant quantum computing by 2030.