Josephson junction microwave amplifier in self-organized noise compression mode

P. Lähteenmäki; Visa Vesterinen; Juha Hassel; Heikki Seppä; P. Hakonen

doi:10.1038/srep00276

Josephson junction microwave amplifier in self-organized noise compression mode

P. Lähteenmäki (Corresponding Author), Visa Vesterinen, Juha Hassel, Heikki Seppä, P. Hakonen

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

Abstract

The fundamental noise limit of a phase-preserving amplifier at frequency is the standard quantum limit. In the microwave range, the best candidates have been amplifiers based on superconducting quantum interference devices (reaching the noise temperature at 700 MHz), and non-degenerate parametric amplifiers (reaching noise levels close to the quantum limit at 8 GHz). We introduce a new type of an amplifier based on the negative resistance of a selectively damped Josephson junction. Noise performance of our amplifier is limited by mixing of quantum noise from Josephson oscillation regime down to the signal frequency. Measurements yield nearly quantum-limited operation, at 2.8 GHz, owing to self-organization of the working point. Simulations describe the characteristics of our device well and indicate potential for wide bandwidth operation.

Original language	English
Article number	276
Journal	Scientific Reports
Volume	2
DOIs	https://doi.org/10.1038/srep00276
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

Applied physics
electronic materials and devices
quantum physics
superconducting materials

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10.1038/srep00276

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Lähteenmäki, P., Vesterinen, V., Hassel, J., Seppä, H., & Hakonen, P. (2012). Josephson junction microwave amplifier in self-organized noise compression mode. Scientific Reports, 2, [276]. https://doi.org/10.1038/srep00276

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AU - Lähteenmäki, P.

AU - Vesterinen, Visa

AU - Hassel, Juha

AU - Seppä, Heikki

AU - Hakonen, P.

N1 - Project code: 72785

PY - 2012

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AB - The fundamental noise limit of a phase-preserving amplifier at frequency is the standard quantum limit. In the microwave range, the best candidates have been amplifiers based on superconducting quantum interference devices (reaching the noise temperature at 700 MHz), and non-degenerate parametric amplifiers (reaching noise levels close to the quantum limit at 8 GHz). We introduce a new type of an amplifier based on the negative resistance of a selectively damped Josephson junction. Noise performance of our amplifier is limited by mixing of quantum noise from Josephson oscillation regime down to the signal frequency. Measurements yield nearly quantum-limited operation, at 2.8 GHz, owing to self-organization of the working point. Simulations describe the characteristics of our device well and indicate potential for wide bandwidth operation.

KW - Applied physics

KW - electronic materials and devices

KW - quantum physics

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JO - Scientific Reports

JF - Scientific Reports

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