Lausanne-based Rhonexum Raises €867.5k to Propel Cryogenic Electronics for Scalable Quantum Computing

In a remarkable stride towards the future of computing, Lausanne-based startup Rhonexum has successfully raised €867.5k ($1 million) in pre-seed funding. This strategic financial boost aims to accelerate the development and commercialization of their pioneering cryogenic electronics, poised to revolutionize scalable quantum computing.

Introduction

Rhonexum, a promising spin-out from the AQUA Lab at the École Polytechnique Fédérale de Lausanne (EPFL), was founded by Vicente Carbon and Dr. Hung-Chi Han in November 2025. The startup is on a mission to become a leading provider of cryogenic electronics, crucial for the transition from lab-sized quantum systems to large-scale, practical machines. This funding round was spearheaded by QDNL Participations, with additional backing from Venture Kick and non-dilutive contributions from notable Swiss innovation programs like EPFL Startup Launchpad, Fondation pour l’Innovation Technologique (FIT), and the Swiss National Science Foundation (SNSF).

Main Body

Rhonexum’s unique technology enables electronics to function at cryogenic temperatures near absolute zero (-270 °C), essential for quantum computing. Unlike conventional electronics, which falter in such extreme conditions, Rhonexum’s solutions promise to optimize thermal-load losses and reduce cabling complexity. The company leverages proprietary models and software tools, facilitating the use of standard semiconductor processes directly within cryogenic systems, thereby addressing a major scalability bottleneck in the quantum realm.

Insights / Analysis

The significance of Rhonexum’s innovation extends beyond quantum computing. The potential applications of cryogenic electronics are vast, including fields like space exploration and advanced sensing technologies. By enabling electronics to operate efficiently at cryogenic temperatures, Rhonexum is paving the way for new breakthroughs in these areas.

For startups and investors, Rhonexum’s progress highlights the importance of niche technologies that solve critical industry challenges. The company’s approach exemplifies how deep tech startups can leverage academic research to create commercially viable solutions. Investors are particularly drawn to Rhonexum’s internal software-driven modeling methodology, which allows for precise cryogenic simulation before fabrication, significantly reducing development time and costs.

Kris Kaczmarek, investment director at QDNL Participations, expressed confidence in Rhonexum’s potential, emphasizing the strategic value of their technology. As Rhonexum prepares to deliver its first industrial-grade cryogenic electronics product to early customers later this year, the startup is set to make significant waves in the tech community.

Conclusion

Rhonexum’s successful funding round marks a pivotal moment in the advancement of cryogenic electronics. With the support of influential investors and innovation programs, the startup is well-positioned to transform quantum computing and beyond. As they continue to grow their design team and accelerate product development, Rhonexum exemplifies the innovative spirit of the Swiss startup ecosystem. For founders, operators, and investors, this development underscores the potential of specialized technologies to drive significant industry progress.

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