We’re backing cryogenic tech to scale quantum computing

Today we’re pleased to share that we have led pre-seed funding in cryogenic electronics startup Rhonexum. The Swiss team has raised $1 million in total.

The funding will allow Rhonexum to accelerate development and begin to commercialize its first product, designed to drive the development of scalable quantum computers.

Rhonexum develops electronics that can operate at cryogenic temperatures close to absolute zero. These temperatures are essential for technologies such as quantum computing, but conventional electronics cannot reliably function in these environments.

By using proprietary models and software tools, Rhonexum can deliver electronics made using standard semiconductor processes that operate directly within cryogenic systems, removing a major scalability bottleneck in quantum computing.

Rhonexum, a spin-out from AQUA Lab at the École Polytechnique Fédérale de Lausanne (EPFL), was founded in November 2025 in Lausanne, Switzerland by Vicente Carbon and Dr. Hung-Chi Han.

Dr. Han is a published expert in cryogenic semiconductor physics and cryogenic transistor modeling, and previously worked at semiconductor giant TSMC. Vicente Carbon has a background in robotics and systems engineering, with a strong focus on translating deep-tech research into industrial applications.

The new funds will be used to accelerate product development, expand the company’s design team, and deliver a first industrial-grade cryogenic electronics product to a limited group of early customers, scheduled for later this year.

Vicente Carbon, co-founder of Rhonexum, said.

“We founded Rhonexum to become the key provider of cryogenic electronics for scalable quantum computers. Our goals are to enable the transition from lab-sized systems to practical, large-scale machines, optimize thermal-load losses and reduce cabling complexity. Our technology also has future strategic applications beyond quantum, such as in space and advanced sensing.”

Kris Kaczmarek, QDNL Participations investment director, said:

“Cryogenic CMOS is an important emerging technology space. Rhonexum stands out with an internal software-driven modeling methodology that enables accurate cryogenic simulation before fabrication, allowing for faster and more cost-effective hardware development. We see real potential here, so we’re proud to support Vicente and Hung-Chi as they work to bring their first product to market.”