Quantum Interconnects, From Rack to Qubit

In this special episode of Electronic Design’s Inside Electronics podcast, sponsored by DigiKey and Amphenol, Guest Host David Maliniak of Microwaves & RF, speaks with James Merryman of Amphenol SV Microwave and Benjamin Pratt of Amphenol CDI about cryogenic interconnects for quantum-computing systems.

James Merryman explains that non-magnetic connectors are most critical near qubits at the refrigerator’s mixing chamber, where millikelvin temperatures and even trace ferromagnetic materials can disrupt coherence and increase error rates. Higher in the system, conventional RF materials may be acceptable.

Benjamin Pratt describes CDI’s CoreCryo, a solderless, high-density coaxial PCB interface designed with non-ferrous materials and mechanical features that withstand thermal cycling. It can extend through the refrigerator with hermetic feedthroughs, attenuation, and customized components. SV Microwave supplies complementary discrete PCB, cable, panel-mount, and feedthrough connectors, plus dense MDRF systems.

The companies offer standard eight- and 16-channel configurations, tested products, engineering models, customization, and support for scaling quantum systems.