Rhonexum, a quantum technology startup, has secured $1 million in pre-seed funding, led by QDNL Participations, with participation from Venture Kick, alongside additional grant support from Swiss innovation programs.
The company is focused on developing electronics capable of operating at cryogenic temperatures, a critical requirement for scalable quantum computing systems. The funding will support early product development and initial commercial deployment.
What The Company Does
Rhonexum builds semiconductor-based electronic components designed to function at extremely low temperatures, close to absolute zero. These conditions are necessary for quantum processors to operate reliably, but they also create significant engineering challenges for conventional electronics.
The company addresses this gap by developing proprietary modelling tools and design approaches that allow standard semiconductor technologies to operate directly in cryogenic environments. This enables control electronics to be positioned closer to quantum processors, reducing the need for complex wiring and external control systems.
By integrating control functions within the cryogenic environment, Rhonexum aims to simplify system architectures while improving performance and scalability. This approach is particularly relevant as quantum computing moves from laboratory experimentation toward more industrialised systems.
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Market Context / Industry Background
Quantum computing development is increasingly constrained by hardware limitations, particularly in the interface between quantum processors and classical control systems. Current setups often rely on room-temperature electronics connected through extensive cabling, which introduces inefficiencies, latency, and scalability challenges.
Cryogenic electronics are emerging as a key enabling technology to address these limitations. By operating within the same temperature range as quantum processors, these components can reduce signal loss and system complexity while supporting more compact system designs.
Beyond quantum computing, demand for electronics capable of operating in extreme environments is also growing in sectors such as space technology and advanced sensing. These adjacent applications provide additional pathways for commercialisation as the quantum ecosystem continues to mature.
Founder / Investor Commentary
Rhonexum was founded by Vicente Carbon and Dr. Hung-Chi Han, combining expertise in cryogenic semiconductor physics, systems engineering, and deeptech commercialisation. The team is positioning the company as a provider of foundational hardware for next-generation computing systems.
Vicente Carbon stated that the company’s objective is to support the transition from experimental quantum setups to scalable, industrial systems. He noted that cryogenic electronics play a central role in reducing system complexity while improving overall efficiency.
He explained that Rhonexum aims to establish itself as a supplier of control electronics that enable more integrated and scalable quantum architectures, addressing a key bottleneck in the development of large-scale machines.
Growth Plans / Use Of Funds
The newly secured funding will be used to advance Rhonexum’s product development and bring its first industrial-grade cryogenic electronics solution to early customers. The company plans to begin initial deployments later this year, targeting organisations working on quantum computing infrastructure.
In parallel, Rhonexum will continue refining its modelling and testing tools, which allow engineers to simulate and validate electronic components under cryogenic conditions. These capabilities are expected to support both internal development and potential collaborations with partners across the quantum ecosystem.
The company will also explore applications beyond quantum computing, including use cases in aerospace and high-performance sensing, where reliable operation in extreme environments is required.
About Rhonexum
Rhonexum is a deeptech company developing cryogenic electronics for quantum computing, high-performance computing, and advanced sensing applications. Founded in 2022 and headquartered in Lausanne, the company provides modelling, testing, and design solutions for semiconductor components operating in low-temperature environments. Its core mission is to enable more scalable and efficient systems by supporting reliable electronics in extreme conditions.
