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Quantum computing platforms compared

The five main hardware platforms for quantum computers, compared on what EU-funded research and innovation shows: projects and funding over time, the companies and countries taking part, research output, and how much of each platform's parts and materials EU-funded projects cover. The figures describe EU-funded activity, not the merit of a platform.

All figures side by side

Bars are scaled within each row; the highest value in a row is in bold.

Quantum computing platforms: figures from EU-funded projects
Figure Superconducting circuits Trapped ions Neutral atoms Photonic qubits Spins and semiconductors
EU-funded projects 48 24 82 92 108 (highest)
EU contribution €136m €57.4m €189m €201m €203m (highest)
Growth in projects between the two periods ×2.0 (highest) ×0.7 ×1.4 ×1.6 ×1.5
Companies in matching projects 22 8 17 36 (highest) 25
of which SMEs 17 5 12 26 (highest) 17
Countries taking part 19 11 19 22 (highest) 21
Publications linked (OpenAIRE) 1,064 611 1,911 (highest) 1,681 1,521
Publications per EUR 1 million 7.8 10.6 (highest) 10.3 8.5 7.8
Parts and materials in the tree 28 (highest) 21 18 19 21
Parts no EU-funded project title names 22 (highest) 19 17 11 14
Critical raw materials among them 7 3 0 4 8 (highest)

How the figures are made

  • Projects, EU contribution and growth: CORDIS projects whose title names the platform (keyword matching, as on the technology map); a project naming two platforms is split between them.
  • Growth compares projects starting 2021–2026 with 2015–2020; the last year is left out because its projects are still being signed.
  • Companies, SMEs and countries: organisations in the projects matching the platform in the parts-and-materials tree, whose keywords differ slightly from the title matching above.
  • Publications: OpenAIRE Graph results linked to the platform's projects, for the projects checked so far; per EUR 1 million only where enough projects are checked.
  • Parts and materials: the source-verified tree; a part counts as a gap when no EU-funded project title names it, which does not mean nobody in Europe works on it.
  • Patents are not counted per platform: the European Patent Office data (EPO OPS) is connected, but it is classified by CPC class and EPO quantum concept, not by platform. Patent families are shown by applicant country and in the technology intelligence reports.

Funding trends by platform · Research output by platform · Parts and materials · Patent families by country · Technology intelligence reports