Cryogenic Multiplexing Control Chip for Superconducting Quantum Processor
A preprint on arXiv proposes a cryogenic multiplexing control chip designed so a single microwave cable can control multiple superconducting qubits. The design uses adjustable inductors to create a non-reciprocal device that generates XY control signals between 4 and 8 GHz. The abstract focuses on the proposed scheme and design.
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What this could mean
- 0–2 yearsPlausible
If fabricated and operated at millikelvin temperatures, the proposed multiplexing control chip could reduce the number of microwave cables needed per qubit in small-scale superconducting processors.
The design directly addresses the wiring bottleneck, but it is currently a proposal with no demonstrated cryogenic performance. A test chip could be built with existing foundry processes, though non-reciprocal behavior and signal fidelity at millikelvin temperatures remain unproven.
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