Lumped-element two-section impedance-matched SNAIL parametric amplifier

  1. D. Moskaleva,
  2. N. Smirnov,
  3. D. Moskalev,
  4. A. Ivanov,
  5. A. Matanin,
  6. D. Baklykov,
  7. M. Teleganov,
  8. V. Polozov,
  9. V. Echeistov,
  10. E. Malevannaya,
  11. I. Korobenko. A. Kuguk,
  12. G. Nikerov,
  13. J. Agafonova,
  14. and I. Rodionov
Broadband impedance-matched Josephson parametric amplifiers are key components for high-fidelity single-shot multi-qubit readout. Nowadays, several types of impedance matched parametric amplifiers have been proposed: the first is an impedance-matched parametric amplifier based on a Klopfenstein taper, and the second is an impedance-matched parametric amplifier based on auxiliary resonators. Here, we present the quantum-limited 3-wave-mixing lumped-element SNAIL parametric amplifier with two-units impedance matching transformer. A two-pole Chebyshev matching network with shunted resonators based on parallel-plate capacitors and superconducting planar coil. Operating in a flux-pumped mode, we experimentally demonstrate an average gain of 15dB across a 600MHz bandwidth, along with an average saturation power of −107dBm and quantum-limited noise temperature.
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