A USD 1 million pre-seed fundraising round was successfully closed by Rhonexum, a deep-tech business that emerged from the Swiss École Polytechnique Fédérale de Lausanne (EPFL). This funding is intended to hasten the development of the company’s ground-breaking cryogenic electronics platform, which attempts to address the crucial hardware constraints presently impeding the expansion of the quantum computing sector.
QDNL Participations, a specialist venture capital firm that focuses on early-stage quantum technologies, led the investment round, and Venture Kick also participated. Rhonexum obtained substantial non-dilutive funding in addition to private capital from a distinguished network of Swiss organizations, such as the Swiss National Science Foundation (SNSF), the Fondation pour l’Innovation Technologique (FIT), and the EPFL Startup Launchpad.
Solving the Cryogenic Challenge
The “scalability bottleneck” that has long afflicted quantum developers is at the center of Rhonexum’s objective. The majority of quantum computers need surroundings kept at cryogenic temperatures close to absolute zero to operate properly; these conditions are simply too harsh for traditional semiconductor components to withstand. This has historically required researchers to employ large, room-temperature electronics outside of the cooling units, connected by a “forest” of cables that, as the system grows larger, produce heat and interfere with signals.
Developing electronics that can function directly in these extremely cold settings is Rhonexum’s solution. The business wants to simplify the architecture of upcoming large-scale machines by moving the control electronics closer to the quantum bits (qubits).
The next paragraph’s information about the overall status of the worldwide quantum market should be independently confirmed as it does not come from the listed, The “NISQ” (Noisy Intermediate-Scale Quantum) era is a transitional period that the worldwide quantum computing sector is now going through. Quantum logic has shown promise in lab-based prototypes, but thousands, if not millions, of qubits are needed to advance to “fault-tolerant” systems. Without high-density, low-power cryogenic control systems like the ones Rhonexum is creating, this transformation is physically impossible.
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A Software-Driven Approach to Hardware
The company’s exclusive design tools and modeling software provide them a competitive advantage. Before cryogenic chips are ever shipped for manufacture, these technologies enable engineers to model and confirm their behavior. Importantly, Rhonexum makes use of mainstream semiconductor techniques, which allows their customized designs to be produced with the help of current industrial infrastructure.
The business claims that this approach can save development expenses and schedules by as much as 90%. The shift from laboratory-scale quantum systems to commercially viable large-scale machines depends on this efficiency.
The Visionaries Behind the Tech
Rhonexum, a spin-out from EPFL’s Advanced Quantum Architecture Laboratory (AQUA Lab), was established in November 2025. The founding team blends industry experience with in-depth academic research. Co-founder Dr. Hung-Chi Han has a wealth of experience in transistor modeling and cryogenic semiconductor physics, having previously worked for the well-known manufacturer TSMC.
Vicente Carbon, his co-founder, has experience in systems engineering and robotics. Carbon’s main goal is to industrialize deep-tech research so that innovations in the lab may be turned into dependable products for the market.
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Strategic Roadmap for 2026
Rhonexum’s first industrial-grade cryogenic electronics product will be delivered with the help of the freshly obtained USD 1 million, which will be utilized to grow the Lausanne-based team. By the end of 2026, the company hopes to deploy this first solution to a small number of early clients.
Rhonexum has already found profitable secondary markets, even though quantum computing is still the core objective. In space technology and sophisticated sensing applications, where conditions are frequently as harsh as those found inside a quantum refrigerator, the ability to operate electronics in extremely cold temperatures has significant ramifications.
The Swiss Innovation Engine
The power of the Lausanne innovation environment is demonstrated by Rhonexum’s quick rise, from its start in late 2025 to a million-dollar seed round in early 2026. An earlier CHF 100,000 Tech Grant from FIT in September 2025 supported this development by offering the early validation required to draw in outside venture capital.
The next paragraph’s information about the Greater Geneva Bern area should be independently confirmed as it is not based on the listed A sort of “Quantum Valley” has emerged in the Greater Geneva Bern area (GGBa). Lausanne is a strategic location for deep-tech firms because of its close proximity to EPFL, CERN, and a high concentration of semiconductor talent. Rhonexum is one of an increasing number of Swiss businesses that are effectively scaling high-complexity hardware solutions, including Xsensio, which recently raised USD 7 million.
Rhonexum’s emphasis on the “unsexy” but crucial plumbing of the system the electronics may turn out to be the most important piece of the puzzle as the race to create a workable quantum computer heats up. The startup is establishing itself as a key architect of the quantum era by drastically reducing the barrier to entry for cryogenic chip creation.
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