A small footprint travelling-wave parametric amplifier with a high Signal-to-Noise Ratio improvement in a wide band

• URL: http://arxiv.org/abs/2408.16366v1
• Date: Thu, 29 Aug 2024 09:23:46 GMT
• Title: A small footprint travelling-wave parametric amplifier with a high Signal-to-Noise Ratio improvement in a wide band
• Authors: Hampus Renberg Nilsson, Liangyu Chen, Giovanna Tancredi, Robert Rehammar, Daryoush Shiri, Filip Nilsson, Amr Osman, Vitaly Shumeiko, Per Delsing,
• Abstract summary: We characterise a small footprint travelling-wave parametric amplifier (TWPA) The device has 200 unitcells and a physical footprint of only 1.1 mm2, yet demonstrates an average parametric gain of 19 dB over a 3 GHz bandwidth.
• Score: 3.4892597780110193
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We characterise a small footprint travelling-wave parametric amplifier (TWPA). The TWPA is built with magnetically flux-tunable superconducting nonlinear asymmetric inductive elements (SNAILs) and parallel-plate capacitors. It implements three-wave mixing (3WM) with resonant phase matching (RPM), a small cutoff frequency for high gain per unitcell and impedance matching networks for large bandwidth impedance matching. The device has 200 unitcells and a physical footprint of only 1.1 mm^2, yet demonstrates an average parametric gain of 19 dB over a 3 GHz bandwidth, an average effective signal-to-noise ratio improvement of 10 dB and a clear speedup of qubit readout time.

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