Broadband parametric amplification in DARTWARS

  1. Felix Ahrens,
  2. Elena Ferri,
  3. Guerino Avallone,
  4. Carlo Barone,
  5. Matteo Borghesi,
  6. Luca Callegaro,
  7. Giovanni Carapella,
  8. Anna Paola Caricato,
  9. Iacopo Carusotto,
  10. Alessandro Cian,
  11. Alessandro D'Elia,
  12. Daniele Di Gioacchino,
  13. Emanuele Enrico,
  14. Paolo Falferi,
  15. Luca Fasolo,
  16. Marco Faverzani,
  17. Giovanni Filatrella,
  18. Claudio Gatti,
  19. Andrea Giachero,
  20. Damiano Giubertoni,
  21. Veronica Granata,
  22. Claudio Guarcello,
  23. Danilo Labranca,
  24. Angelo Leo,
  25. Carlo Ligi,
  26. Giovanni Maccarrone,
  27. Federica Mantegazzini,
  28. Benno Margesin,
  29. Giuseppe Maruccio,
  30. Renato Mezzena,
  31. Anna Grazia Monteduro,
  32. Roberto Moretti,
  33. Angelo Nucciotti,
  34. Luca Oberto,
  35. Luca Origo,
  36. Sergio Pagano,
  37. Alex Stephane Piedjou,
  38. Luca Piersanti,
  39. Alessio Rettaroli,
  40. Silvia Rizzato,
  41. Simone Tocci,
  42. Andrea Vinante,
  43. and Mario Zannoni
Superconducting parametric amplifiers offer the capability to amplify feeble signals with extremely low levels of added noise, potentially reaching quantum-limited amplification. This characteristic makes them essential components in the realm of high-fidelity quantum computing and serves to propel advancements in the field of quantum sensing. In particular, Traveling-Wave Parametric Amplifiers (TWPAs) may be especially suitable for practical applications due to their multi-Gigahertz amplification bandwidth, a feature lacking in Josephson Parametric Amplifiers (JPAs), despite the latter being a more established technology. This paper presents recent developments of the DARTWARS (Detector Array Readout with Traveling Wave AmplifieRS) project, focusing on the latest prototypes of Kinetic Inductance TWPAs (KITWPAs). The project aims to develop a KITWPA capable of achieving 20 dB of amplification. To enhance the production yield, the first prototypes were fabricated with half the length and expected gain of the final device. In this paper, we present the results of the characterization of one of the half-length prototypes. The measurements revealed an average amplification of approximately 9dB across a 2GHz bandwidth for a KITWPA spanning 17mm in length.
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