Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

By T. White, J. Mutus, I. Hoi, R. Barends, B. Campbell, Yu Chen, Z. Chen, B. Chiaro, A. Dunsworth, Evan Jeffrey and 11 more. 2015

171 citations recorded by the source corpus.

Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance, while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted λ/4 resonators at regular intervals along the transmission line in order to maintain the phase matching condition between pump, signal, and idler and increase gain. We achieve an average gain of 12 dB across a 4 GHz span, along with an average saturation power of −92 dBm with noise approaching the quantum limit.

Subfields: Artificial Intelligence, Astronomy and Astrophysics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/2e4fdede095f3f16009ef67e26012fa58d6161b3

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In Artificial Intelligence

In Astronomy and Astrophysics

Franco Nori

In Condensed Matter Physics

Citations in the corpus

Circuit quantum electrodynamics (2020, background): “This device does not have a fixed gain-bandwidth product and has been demonstrated to have 20 dB over as much as 3 GHz bandwidth while operating close to the quantum limit (Macklin et al., 2015; Planat et al., 2020; White et al., 2015).”
Microwave photonics with superconducting quantum circuits (2017, background): “Furthermore, directional amplification has also been demonstrated with travelling-wave amplifiers, implemented with a large number of Josephson junctions forming a nonlinear lumped-element transmission line [242, 243].”