A review and simulation study arguing that Blochnium-based Josephson parametric amplifiers improve linearity and tunability over conventional arrays, with a headline simulated P1dB of -92 dBm.
Wideband Josephson Parametric Amplifier with Integrated Transmission Line Transformer
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abstract
We describe a wide-band Josephson Parametric Amplifier (JPA) that is impedance-matched using an integrated compact superconducting transmission line transformer. The impedance transformer consists of two broadside coupled transmission lines configured in a Ruthroff topology which enables a wide matching bandwidth from 2 to 18 GHz, reducing the input line impedance and the device resonance quality factor by a factor of 4. This enables gain flatness and flexibility in the choice of the amplifier's tuning range. The amplifier has up to 20dB gain, with less than 1 dB of ripple, 2-3 GHz gain-bandwidth product and -126 dBm input 1-dB compression point. Moreover, the device active area fits into a 1mm x 1mm space, thus easing integration into large quantum systems.
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quant-ph 1years
2025 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
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Technical Review on RF-Amplifiers for Quantum Computer Circuits: New Architectures of Josephson Parametric Amplifier
A review and simulation study arguing that Blochnium-based Josephson parametric amplifiers improve linearity and tunability over conventional arrays, with a headline simulated P1dB of -92 dBm.