A Sub-GHz Impedance-engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots

Visa Vesterinen; Slawomir Simbierowicz; Robab Najafi Jabdaraghi; Leif Gronberg; Janne S. Lehtinen; Mika Prunnila; Joonas Govenius

doi:10.1109/TASC.2022.3148965

A Sub-GHz Impedance-engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots

Visa Vesterinen, Slawomir Simbierowicz, Robab Najafi Jabdaraghi, Leif Gronberg, Janne S. Lehtinen, Mika Prunnila, Joonas Govenius

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

1 Citation (Scopus)

Abstract

In the work on superconducting parametric amplifiers, the frequency band below one gigahertz is calling for systematic improvements. Despite a prospect for ultralow added noise, bandwidth limitations have slowed down the integration of such amplifiers into sub-GHz experiments demanding fast ($< 1\, \mu$s) readout speeds. Here, we study the impedance engineering of a flux-driven Josephson parametric amplifier (JPA) at 600 MHz. We propose, simulate and experimentally demonstrate a partially reconfigurable impedance transformer. The transformer enhances the JPA bandwidth to a state-of-the-art value of 10 MHz at 20 dB gain. Our amplifier has immediate applications in the readout of cryogenic sensors and in the reflectometry of quantum dots for spin qubit quantum computing.

Original language	English
Journal	IEEE Transactions on Applied Superconductivity
Volume	32
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2022.3148965
Publication status	Published - 1 Jun 2022
MoE publication type	A1 Journal article-refereed

Keywords

Bandwidth
Impedance
Inductance
Microwave amplifiers
quantum computing
Quantum dots
Resonators
SQUIDs
superconducting devices
Transformers

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10.1109/TASC.2022.3148965Licence: CC BY

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abstract = "In the work on superconducting parametric amplifiers, the frequency band below one gigahertz is calling for systematic improvements. Despite a prospect for ultralow added noise, bandwidth limitations have slowed down the integration of such amplifiers into sub-GHz experiments demanding fast ($< 1\, \mu$s) readout speeds. Here, we study the impedance engineering of a flux-driven Josephson parametric amplifier (JPA) at 600 MHz. We propose, simulate and experimentally demonstrate a partially reconfigurable impedance transformer. The transformer enhances the JPA bandwidth to a state-of-the-art value of 10 MHz at 20 dB gain. Our amplifier has immediate applications in the readout of cryogenic sensors and in the reflectometry of quantum dots for spin qubit quantum computing.",

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AU - Gronberg, Leif

AU - Lehtinen, Janne S.

AU - Prunnila, Mika

AU - Govenius, Joonas

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KW - Impedance

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A Sub-GHz Impedance-engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots

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Keywords

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