Rhonexum raises fresh capital for quantum-ready electronics
Lausanne-based startup Rhonexum has secured €867.5k in funding to accelerate the development of its next-generation cryogenic electronics, a critical building block for scalable quantum computing. The early-stage company, spun out of Swiss academic research, is working on ultra-low-temperature integrated circuits designed to sit in close proximity to quantum processors.
The new capital will allow Rhonexum to expand its engineering team, refine its chip designs and move towards pilot deployments with leading quantum hardware developers. The round underscores growing investor conviction that breakthroughs in supporting electronics are as essential as advances in qubits themselves.
Tackling the bottleneck in scalable quantum systems
Most current quantum computers rely on bulky, room‑temperature control systems connected to qubits via long cables running into cryogenic chambers. This architecture introduces significant latency, signal loss and energy consumption, limiting how far systems can scale.
Rhonexum is building specialized integrated circuits that operate reliably at cryogenic temperatures, close to the quantum processor. By shifting key control and readout functions into the cold environment, the company aims to reduce noise, simplify system design and enable much larger qubit counts.
The startup’s approach could be particularly important for platforms such as superconducting qubits and spin qubits, where operating temperatures can be just a few millikelvin above absolute zero. Robust, low‑power cryogenic controllers are considered a prerequisite for commercial‑scale quantum hardware.
Positioning Switzerland as a quantum engineering hub
Based in Lausanne, near leading research institutions and deep‑tech investors, Rhonexum benefits from Switzerland’s growing reputation in quantum technologies. The new funding will support collaborations with academic labs and industrial partners working on full‑stack quantum systems, from materials and qubits to software and applications.
As governments and corporations worldwide increase spending on quantum R&D, enabling technologies such as cryogenic electronics are attracting heightened attention. With this financing, Rhonexum aims to turn its prototypes into deployable products and help bridge the gap between today’s experimental machines and tomorrow’s large‑scale quantum computers.