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Demonstration of a multiplexer of dissipationless superconducting quantum interference devices
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10.1063/1.2803852
/content/aip/journal/apl/92/2/10.1063/1.2803852
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/2/10.1063/1.2803852
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

SQUID photographs and circuit schematic. [(a) and (b)] Photographs of two SQUID designs. A low-pass filter takes up the bottom half of each photograph and the waveguide is just visible at the top. In (a), the SQUID is wired in series with the resonator. In (b), the SQUID inductively couples to the resonator. Both designs are gradiometric to reduce coupling to the environment. (c) Simplified schematic of the readout circuit, with the resonators modeled as parallel resonators.

Image of FIG. 2.
FIG. 2.

Flux dependence of resonators 30 at 40 pW incident power. (a) Transmitted power as a function of frequency at three different values of flux through the SQUID, 0 (red), (green), and (blue). (b) Resonance circles for the same three values of flux, where 4.4654 GHz is marked (x) on each circle. (c) Angle of 4.4654–Ghz on the resonance circle.

Image of FIG. 3.
FIG. 3.

Flux noise spectrum of resonator 30. The inset magnifies the spectrum around a 100 kHz flux tone injected through the input coil to calibrate the noise.

Image of FIG. 4.
FIG. 4.

(Red line) A flux signal applied to resonator 17. (Blue dots) Flux in the SQUID determined from the phase shift of the transmitted phase response, each dot corresponding to a single multiple flux quanta ramp of the modulation. The two insets show the transmitted phase as a function of time (expanded scale) for both a reference signal of 0 (black line) and the input signal (blue dots).

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/content/aip/journal/apl/92/2/10.1063/1.2803852
2008-01-18
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Demonstration of a multiplexer of dissipationless superconducting quantum interference devices
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/2/10.1063/1.2803852
10.1063/1.2803852
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