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

Research output: Contribution to journalArticleScientificpeer-review

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 languageEnglish
JournalIEEE Transactions on Applied Superconductivity
Volume32
Issue number4
Early online date7 Feb 2022
DOIs
Publication statusE-pub ahead of print - 7 Feb 2022
MoE publication typeA1 Journal article-refereed

Keywords

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

Fingerprint

Dive into the research topics of 'A Sub-GHz Impedance-engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots'. Together they form a unique fingerprint.

Cite this