DOI: 10.1063/1.3653473. Josephson amplifier for qubit readout

10.1063/1.3653473

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We report on measurements of a Josephson amplifier (J-amp) suitable for quantum-state qubit readout in the microwave domain. It consists of two microstrip resonators which intersect at a Josephson ring modulator. A maximum gain of about 20 dB, a bandwidth of 9 MHz, and a center-frequency tunability of about 60 MHz with gain in excess of 10 dB have been attained for idler and signal of frequencies 6.4 GHz and 8.1 GHz, in accordance with theory. Maximum input power measurements of the J-amp show a relatively good agreement with theoretical prediction. We discuss how the amplifier characteristics can be improved.

Bibliography

Abdo, B., Schackert, F., Hatridge, M., Rigetti, C., & Devoret, M. (2011). Josephson amplifier for qubit readout. Applied Physics Letters, 99(16).

Authors 5

Baleegh Abdo (first)
Flavius Schackert (additional)
Michael Hatridge (additional)
Chad Rigetti (additional)
Michel Devoret (additional)

References 24 Referenced 87

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10.1126/science.1175552 / Science (2009)
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Dates

Type	When
Created	13 years, 10 months ago (Oct. 18, 2011, 6:35 p.m.)
Deposited	2 years, 1 month ago (July 3, 2023, 3:19 p.m.)
Indexed	6 days, 20 hours ago (Aug. 23, 2025, 9:11 p.m.)
Issued	13 years, 10 months ago (Oct. 17, 2011)
Published	13 years, 10 months ago (Oct. 17, 2011)
Published Online	13 years, 10 months ago (Oct. 18, 2011)
Published Print	13 years, 10 months ago (Oct. 17, 2011)

Funders 0

None

BibTeX

@article{Abdo_2011, title={Josephson amplifier for qubit readout}, volume={99}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.3653473}, DOI={10.1063/1.3653473}, number={16}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Abdo, Baleegh and Schackert, Flavius and Hatridge, Michael and Rigetti, Chad and Devoret, Michel}, year={2011}, month=oct }

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