Swiss quantum technology startup Rhonexum has raised $1 million in pre-seed funding, led by QDNL Participations, with participation from Venture Kick and additional grant support.
Based in Lausanne and spun out of EPFL’s AQUA Lab, Rhonexum develops electronics capable of operating at cryogenic temperatures close to absolute zero, conditions required for quantum computing, where conventional electronics cannot function reliably.
By combining proprietary models and software tools, the company designs components using standard semiconductor processes that can operate directly within cryogenic environments, helping to overcome a major scalability challenge in the field. Bringing control electronics closer to quantum processors reduces system complexity and enables more compact and efficient architectures.
The company was founded by Vicente Carbon and Dr Hung-Chi Han, combining expertise in cryogenic semiconductor physics, systems engineering, and the industrialisation of deeptech technologies.
Vicente Carbon, co-founder of Rhonexum, said the company aims to become a provider of cryogenic electronics for scalable quantum systems, supporting the transition from laboratory setups to large-scale machines while reducing complexity and improving efficiency.
In addition to equity investment, Rhonexum has received support from Swiss innovation programs, including EPFL Startup Launchpad, Fondation pour l'Innovation Technologique, and the Swiss National Science Foundation.
The company plans to deliver its first industrial-grade cryogenic electronics product to a group of early customers later this year, with potential applications extending beyond quantum computing into areas such as space technologies and advanced sensing.
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