Traveling Wave Parametric Amplifiers

11:30 am – 2:30 pm, Thursday March 20 // Session MAR-S09 //Anaheim Convention Center, 204C (Level 2)

Chair:: Lucas Janssen, University of Cologne
Topics:
Sponsored by: DQI

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

1:42 pm – 1:54 pm

Presenter: Hampus Renberg Renberg Nilsson (Chalmers Univ of Tech)

We fabricate and characterise a travelling-wave parametric amplifier (TWPA). It implements three-wave mixing (3WM) by using magnetically flux-biased superconducting nonlinear asymmetric inductive elements (SNAILs). Phase matching is achieved by means of resonant phase matching (RPM) with lumped-element oscillators, up-conversion phase mismatching by using a small cutoff frequency and impedance matching by adding impedance matching networks at the input and output ports. The device has a physical footprint of only 1.1 mm² and only 200 unitcells, 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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