European Sovereignty Monitor

Compute and infrastructure

Swiss startup Rhonexum raises USD 1 million for cryogenic quantum chip electronics

Lausanne based Rhonexum, an EPFL AQUA Lab spinout, raised USD 1 million in pre-seed funding led by Dutch fund QDNL Participations plus Venture Kick and Swiss grants, to build cryogenic electronics that sit inside quantum computers' cold chambers.

Verified Editor-read Rhonexum company announcement, 18 March 2026

What it does not test. It does not establish that the technology has been proven at industrial scale or adopted by a quantum computer maker.

How this item counts. Towards autonomy: it changes who made the parts. Binding 2 of 3 (agreed or funded), scale 1 of 3 (small), Verified counts in full: weight +2 of 36 possible. Swiss startup funded to build EU quantum-chip cryogenic parts; small, unproven at scale. European Sovereignty Index

How this item was made. Drafted by an AI system (Claude (Anthropic)) from the source cited above; read and approved by the editor on 2026-09-20. How the record is made

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