Granular Aluminum Parametric Amplifier for Low-Noise Measurements in Tesla Fields

Josephson junction parametric amplifiers have become essential tools for microwave quantum circuit readout with minimal added noise. Even after improving at an impressive rate in the last decade, they remain vulnerable to magnetic field, which limits their use in many applications such as spin qubit...

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Bibliographic Details
Published in:arXiv.org 2024-04
Main Authors: Zapata, Nicolas, Takmakov, Ivan, Günzler, Simon, Nambisan, Ameya, Rieger, Dennis, Reisinger, Thomas, Wernsdorfer, Wolfgang, Pop, Ioan M
Format: Article
Language:English
Subjects:
Aluminum
Amplification
Dark matter
Inductance
Josephson junctions
Magnetic fields
Parametric amplifiers
Qubits (quantum computing)
Resilience
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Summary:Josephson junction parametric amplifiers have become essential tools for microwave quantum circuit readout with minimal added noise. Even after improving at an impressive rate in the last decade, they remain vulnerable to magnetic field, which limits their use in many applications such as spin qubits, Andreev and molecular magnet devices, dark matter searches, etc. Kinetic inductance materials, such as granular aluminum (grAl), offer an alternative source of non-linearity with innate magnetic field resilience. We present a non-degenerate amplifier made of two coupled grAl resonators resilient to in-plane magnetic field up to 1 T. It offers 20 dB of gain close to the quantum limit of added noise, with a gain-bandwidth product of 28 MHz and -110 dBm input saturation power.
ISSN:2331-8422