Fujitsu develops diamond-spin quantum computer prototype

KAWASAKI, Japan, Sept 8, 2026 - (JCN Newswire) - Fujitsu today announced that it has developed the world's first working prototype of a diamond-spin quantum computer incorporating tin-vacancy (SnV) centers into photonic integrated circuits [1] [2]. The prototype can be operated at -271.6'C, higher than the typical operating temperature of superconducting quantum computers (-273.13'C) and Fujitsu has demonstrated in a test environment that it can be utilized via the Fujitsu Hybrid Quantum Computing Platform without any additional specialist knowledge. This development represents an important milestone toward realizing a modular architecture, one of the most promising approaches for scaling quantum computers, due to its high fidelity and efficient optical connectivity.

The prototype is based on the results of joint research started in 2020 by Fujitsu, Delft University of Technology, and QuTech, a world-leading quantum technology research institute and part of TU Delft.

Fujitsu is set to develop a prototype of a multi-module diamond-spin quantum computer by 2027. In addition, Fujitsu will begin developing of technologies to integrate diamond-spin approach with superconducting approach, driving progress toward achieving large-scale quantum computers.