Fujitsu has developed a working prototype of a diamond-spin quantum computer.. In a statement, the Japanese tech giant said the system was the “world’s first” system of its kind to incorporate tin-vacancy (SnV) centers into photonic integrated circuits.. – Fujitsu. The prototype can be operated at -271.6°C (-456.9°F), higher than the typical operating temperature of superconducting quantum computers, which is around -273.13°C (-459.6°F)..
SnV centers are atomic-scale defects that occur when a tin atom is placed inside a diamond to leave a ‘vacancy.’ These custom flaws are known as ‘centers.’. Typical diamond-spin approaches use nitrogen-vacancy centers, where nitrogen atoms are inserted into diamonds. However, by using tin-vacancy, Fujitsu said it was able to produce centers which feature “structural symmetry and are less susceptible to external noise than NV centers, making them attractive candidates for stable, high-brightness color centers.”.
The prototype is based on research jointly undertaken by Fujitsu, Delft University of Technology (TU Delft) in the Netherlands, and QuTech, a quantum technology research institute and part of TU Delft, and forms part of the company’s quantum roadmap, which outlines its aim to realize practical quantum computing by 2030.. Fujitsu said it will now begin development of a multi-module diamond-spin quantum computing prototype by 2027, alongside technologies to integrate a diamond-spin approach with a superconducting approach, “driving progress toward achieving large-scale quantum computers.”. “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,” said Vivek Mahajan, corporate executive officer and VP, CTO, in charge of system platform, Fujitsu..
“Under our roadmap to achieve a 250 logical qubit system by fiscal year 2030 and a 1,000 logical qubit system by fiscal year 2035, Fujitsu will continue advancing practical quantum computing across a broad range of areas, from software to hardware, while leveraging the key advantages of the diamond-spin approach, including high fidelity and optical connectivity.”. The announcement comes just over a year after Fujitsu announced it had started development of its planned 10,000-plus qubit superconducting quantum computer..
Initially set to operate with 250 logical qubits and utilize Fujitsu’s STAR architecture – an early-stage fault-tolerant quantum computing (early-FTQC) architecture developed by the company – the company said construction of the system is expected to be completed in 2030.. 30 Mar 2026.
03 Jun 2026
