S-Transistors Raises €2.6 Mn to Build Superconducting Technology for Scalable Quantum Computers

S-Transistors was created from research at VTT Technical Research Centre of Finland. It is developing superconducting transistors that can operate at extremely low temperatures while offering high speed and very low power consumption.

The company’s technology could have applications in quantum computing, AI, high-performance computing, spacecraft electronics and particle detectors. For now, S-Transistors is mainly focused on helping scale quantum computers.

Superconducting quantum computers currently rely on control electronics that often operate at room temperature. These systems use many cables to connect with the quantum processor. As the number of qubits increases, this setup becomes more complex and uses more power.

S-Transistors wants to bring control electronics closer to the quantum processor and make them work efficiently at cryogenic temperatures. Its technology could reduce the need for complex cabling and lower power consumption, helping make larger quantum computers more practical.

"Today's efforts in scaling cryogenic quantum computers have delivered tremendous progress, with several practical use cases already demonstrated. However, further scaling is approaching a hard wall, as it still relies on power-hungry room-temperature electronics and separate wiring for each quantum bit (qubit) - both used to operate the quantum computer and link it to the outside world. The clearest path forward, for superconducting quantum computers in particular, is to bring the classical control and interface hardware down into the cryostat, right next to the quantum chip kept cold to protect its fragile quantum states. The catch is that such integration is extremely demanding in power dissipation, speed, and energy efficiency," says Dr. Heorhii Bohuslavskyi, Co-founder and CEO of S-Transistors. "Superconducting transistors are exactly that missing piece of hardware for large-scale, energy-efficient quantum computing."

"When you think about it, the transistor is the most mass-manufactured device in human history. By combining the transistor functionality, with its unparalleled computing potential, and the superconducting property of near-zero power dissipation in a single device, we can reach a completely new level of energy-efficient cryogenic computing. In the near term, this already solves the cryogenic signal routing and delivery problems the superconducting quantum computer, but the real vision is the quantum motherboard: a completely new platform for scaling quantum computers, operating at mK temperatures, and controlling the operation of qubit-based QPU," says Dr. Andrey Generalov, Co-founder and CTO of S-Transistors.

"S-Transistors is one of those rare companies built around a genuinely new piece of fundamental technology that could become an enabling layer for an entire industry. As quantum computers scale from hundreds or thousands of qubits toward commercially useful machines, we believe superconducting transistors can become a critical part of the hardware stack that makes that scaling possible," says Jyri Engeström, Partner at Lifeline Ventures.

S-Transistors is developing a new type of transistor designed to make classical and quantum computers faster and more energy-efficient. The company is using its patent-pending manufacturing technology and early circuit designs, backed by more than 50 years of combined experience in microelectronics, cryogenics, quantum electronics and advanced manufacturing.

The company is working closely with researchers and quantum computing companies across Europe, North America and Asia to understand their biggest challenges. Its main goal is to build the world’s first quantum motherboard, which could help solve current scaling problems and support the development of large-scale quantum computers.

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