Fujitsu advances quantum computing with diamond spin prototype and neutral atom testing

Fujitsu has announced the development of a prototype quantum computer using the diamond spin method. This new prototype utilizes tin-vacancy (SnV) centers in diamonds, which offer higher brightness and better resistance to external noise compared to traditional nitrogen-vacancy centers. Developed in collaboration with Delft University of Technology and QuTech, the system features a modular architecture designed for scalability via optical connections.

Fujitsu has established a roadmap to reach 250 logical qubits by fiscal year 2030 and 1,000 logical qubits by fiscal year 2035. The company is also working on heterogeneous material bonding techniques to create scalable chips and has integrated photonics circuits to improve photon extraction efficiency.

In a separate development, Fujitsu has partnered with the startup Yaqumo to conduct hardware verification of quantum computing architectures using neutral atom quantum computers. The collaboration aims to test the compatibility of Fujitsu’s ‘STAR architecture’—which seeks to reduce the number of physical qubits required—with Yaqumo’s ytterbium-based neutral atom hardware. This effort includes adapting Fujitsu’s open-source software to allow users to operate different types of quantum computers through a unified interface.