Customized high channel density and IR-filtered cryogenic cable solution characterization for quantum test environments*

Scaling quantum control and readout connectivity is at the core of the development of the quantum computer. Similar scaling issues arise in earlier steps, for example when investigating production yield and response uniformity of qubits for a given nanotechnology. At this stage, automated and scalable testing solutions are highly desirable to streamline the process, where otherwise manual testing is time consuming and prone to errors. Research centers will strongly benefit from a common and scalable test bench environment, including the interconnection technology with several dozens of signal channels carrying bias, base-band control signals and RF control signals.

As part of the development of a common test environment, the Institut Quantique in Sherbrooke is investigating and characterizing customized multichannel cable solutions from Delft Circuits. To be installed in the Quantum Fablab environment, the multichannel cables under study aim to support high bias voltage (±10V), base-band signaling, RF signaling and embedded IR filtering to minimize noise at the low temperature sample. The presentation will provide a comparative study between the current standard coax cable solution and the customized multichannel cables.