Lumped-element SNAIL parametric amplifier with two-pole matching network

Broadband impedance-matched Josephson parametric amplifiers are key components for high-fidelity single-shot multi-qubit readout. Nowadays, several types of impedance matched parametric amplifiers have been proposed: the first is an impedance-matched parametric amplifier based on a Klopfenstein tape...

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Bibliographic Details
Published in:Applied physics letters 2024-10, Vol.125 (16)
Main Authors: Moskaleva, D., Smirnov, N., Moskalev, D., Ivanov, A., Matanin, A., Baklykov, D., Teleganov, M., Polozov, V., Echeistov, V., Malevannaya, E., Korobenko, I., Kuguk, A., Nikerov, G., Agafonova, J., Rodionov, I.
Format: Article
Language:English
Subjects:
Broadband
Chebyshev approximation
Impedance matching
Noise temperature
Parametric amplifiers
Qubits (quantum computing)
Resonators
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Summary:Broadband impedance-matched Josephson parametric amplifiers are key components for high-fidelity single-shot multi-qubit readout. Nowadays, several types of impedance matched parametric amplifiers have been proposed: the first is an impedance-matched parametric amplifier based on a Klopfenstein taper, and the second is the impedance-matched parametric amplifier based on auxiliary resonators. Here, we present the quantum-limited 3-wave-mixing lumped-element SNAIL parametric amplifier with two-pole impedance matching transformer. A two-pole Chebyshev matching network with shunted resonators is based on parallel-plate capacitors and superconducting planar coil. Operating in a flux-pumped mode, we experimentally demonstrate an average gain of 15 dB across a 600 MHz bandwidth, along with an average saturation power of −107 dBm and quantum-limited noise temperature.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0230973