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arXiv:1703.01693 · Applied Physics Letters

Single-sideband modulator for frequency domain multiplexing of superconducting qubit readout

Benjamin J. Chapman, Eric I. Rosenthal, Joseph Kerckhoff, Leila R. Vale, Gene C Hilton, Konrad W. Lehnert

Published Apr 17, 2017• 13 citations
arXivHTMLPDF

Abstract

We introduce and experimentally characterize a superconducting single-sideband modulator compatible with cryogenic microwave circuits and propose its use for frequency domain multiplexing of superconducting qubit readout. The monolithic double-balanced modulators that comprise the device are formed with purely reactive elements (capacitors and Josephson junction inductors) and require no microwave-frequency control tones. Microwave signals in the 4 to 8 GHz band, with power up to −85 dBm, are converted up or down in frequency by as much as 120 MHz. Spurious harmonics in the device can be suppressed by up to 25 dB for select probe and modulation frequencies.

DOI
10.1063/1.4981390

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