Four wave-mixing in a microstrip kinetic inductance travelling wave parametric amplifier

Superconducting quantum circuits are typically operated at low temperatures (mK), necessitating cryogenic low-noise, wideband amplifiers for signal readout ultimately also compatible with room temperature electronics. While existing implementations partly meet these criteria, they suffer from certai...

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Bibliographic Details
Published in:Applied physics letters 2020-04, Vol.116 (15)
Main Authors: Goldstein, Samuel, Kirsh, Naftali, Svetitsky, Elisha, Zamir, Yuval, Hachmo, Ori, de Oliveira, Clovis Eduardo Mazzotti, Katz, Nadav
Format: Article
Language:English
Subjects:
Applied physics
Bandwidths
Broadband
Cryogenic temperature
Four-wave mixing
Impedance matching
Inductance
Low temperature
Parametric amplifiers
Phase velocity
Room temperature
Silicides
Traveling wave amplifiers
Traveling waves
Tungsten
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Summary:Superconducting quantum circuits are typically operated at low temperatures (mK), necessitating cryogenic low-noise, wideband amplifiers for signal readout ultimately also compatible with room temperature electronics. While existing implementations partly meet these criteria, they suffer from certain limitations, such as rippled transmission spectra or limited dynamic range, some of which are caused by the lack of proper impedance matching. We develop a microstrip kinetic inductance traveling wave amplifier, exploiting the nonlinear kinetic inductance of tungsten-silicide for wave-mixing of the signal and a pump, and engineer the impedance to 50   Ω, while decreasing the phase velocity, with benefit for the amplification. Despite losses, pumping on our device amplifies the signal by 15 dB over a 2 GHz bandwidth.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0004236