Launched at the APS Global Physics Summit 2025, this system could help to transform how researchers and developers connect control electronics to Quantum Processing Units (QPUs), offering a streamlined and readily deployable solution to overcome critical scalability challenges.
As quantum computing transitions from theoretical possibility to practical reality, the industry faces a number of significant hurdles in scaling up operations. For example, the number of required wires scales proportionally with the number of qubits and computation power. This means that wiring density is increasingly becoming the limiting factor in quantum computing setups.
Delft Circuits’ new HD I/O system directly addresses this bottleneck by offering a complete and readily available package that eliminates the complexities and time-consuming integration that’s associated with setting up high-density connectivity for quantum computers.
The module offers 256 channels, allowing control of up to 64 qubits per module. Its modular loader design also enables expansion in increments of 32 channels. This modularity and high density translate to a doubling of channel capacity without the need for a larger quantum refrigerator. It also comes at a lower price point than conventional coaxial cables with the closest high-density coax alternative having 168 channels per port.
The HD I/O system is available for all Cri/oFlex products and offers an ultra-small formfactor due to its flexible strip-line design with integrated components for signal conditioning.
Standard coaxial cables require filters to be integrated per channel, per cryostat stage location to protect qubits from higher and lower frequency electromagnetic signals, and this often introduces multiple points of failure. By having these filters already integrated, Cri/oFlex has improved reliability and allows upscale to higher density cabling solutions - further simplifying adoption and progress for researchers and developers in various quantum application fields, such as superconducting, spin and photonic qubits.
Commenting Daan Kuitenbrouwer, CCO & Founder, Delft Circuits, said, "We can comfortably state that we have addressed the scaling problem in quantum computing. For years, our customers in the quantum computing space have voiced a clear need: a simple, scalable solution to move beyond the limitations of coaxial cables. With this turnkey HD I/O system, we're delivering on that demand. It's not just about increased density and lower cost - it's about providing a complete, ready-to-deploy package that lets researchers focus on their quantum algorithms and breakthroughs, not on intricate hardware integration.”
“The scalability of cryogenic I/O has been a looming challenge for the quantum computing industry,” added Dr. Thorsten Last, Executive Director at OrangeQS. “Coaxial solutions are not dense enough for the deployment or testing of utility-scale quantum chips, so progress on these components will remove a critical obstacle towards practical quantum computers and utility-scale quantum chip test equipment.”
