Demonstration of a Multiplexer of Dissipationless SQUIDs}

Published

January 18, 2008

Author(s)

John Mates, Gene C. Hilton, Kent D. Irwin, Leila R. Vale, Konrad Lehnert

Abstract

We report on the development of a microwave SQUID multiplexer for reading out arrays of low-temperature detectors. In this frequency-division multiplexer, each SQUID couples to a high-Q superconducting resonator so that flux through the SQUID shifts the resonant frequency. The multiplexer consists of multiple SQUIDs coupled to resonators of different resonant frequencies, all coupled to a common transmission line. We demonstrate multiple designs, with high $Q$ values (4,100-17,000), noise as low as 0.17$\mu\Phi_0}/\sqrt\mathrmHz}}$, power dissipation as low as 5pW per resonator, and a naturally linear readout scheme based on flux modulation. This multiplexing approach is compatible with existing low-temperature detectors such as superconducting transition-edge sensor (TES) detectors and magnetic calorimeters, and is capable of multiplexing thousands of detectors in a single channel.

Citation

Applied Physics Letters

Volume

92

Pub Type

Journals

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Keywords

SQUIDs, multiplexer

Citation

Mates, J. , Hilton, G. , Irwin, K. , Vale, L. and Lehnert, K. (2008), Demonstration of a Multiplexer of Dissipationless SQUIDs}, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32740 (Accessed October 15, 2025)