Demonstration of a superconducting nanowire microwave switch

Abstract

The functionality of a nanowire integrated into a superconducting transmission line acting as a single pole single throw switch is demonstrated. The switch has an instantaneous bandwidth from 2 to 8 GHz with more than 10 dB of isolation between the open and closed states. The switch consumes no power in the closed state and $\approx 15\mathrm{nW}$ in the open state. The rise and fall response time between open and closed states is approximately $370\mathrm{ps}$.

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• Millikelvin temperature cryo-CMOS multiplexer for scalable quantum device characterisation
• A compact and tunable forward coupler based on high-impedance superconducting nanowires
• Tunable compact on-chip superconducting switch
• Overhead in Quantum Circuits with Time-Multiplexed Qubit Control
• Near-deterministic photon entanglement from a spin qudit in silicon using third quantisation