D. Di Gioacchino

Ultra low noise readout with travelling wave parametric amplifiers: the DARTWARS project

  1. A. Rettaroli,
  2. C. Barone,
  3. M. Borghesi,
  4. S. Capelli,
  5. G. Carapella,
  6. A. P. Caricato,
  7. I. Carusotto,
  8. A. Cian,
  9. D. Di Gioacchino,
  10. E. Enrico,
  11. P. Falferi,
  12. L. Fasolo,
  13. M. Faverzani,
  14. E. Ferri,
  15. G. Filatrella,
  16. C. Gatti,
  17. A. Giachero,
  18. D. Giubertoni,
  19. V. Granata,
  20. A. Greco,
  21. C. Guarcello,
  22. D. Labranca,
  23. A. Leo,
  24. C. Ligi,
  25. G. Maccarrone,
  26. F. Mantegazzini,
  27. B. Margesin,
  28. G. Maruccio,
  29. C. Mauro,
  30. R. Mezzena,
  31. A. G. Monteduro,
  32. A. Nucciotti,
  33. L. Oberto,
  34. L. Origo,
  35. S. Pagano,
  36. V. Pierro,
  37. L. Piersanti,
  38. M. Rajteri,
  39. S. Rizzato,
  40. A. Vinante,
  41. and M. Zannoni
The DARTWARS project has the goal of developing high-performing innovative travelling wave parametric amplifiers with high gain, large bandwidth, high saturation power, and nearly quantum-limited
noise. The target frequency region for its applications is 5 – 10 GHz, with an expected noise temperature of about 600 mK. The development follows two different approaches, one based on Josephson junctions and one based on kinetic inductance of superconductors. This contribution mainly focuses on the Josephson travelling wave parametric amplifier, presenting its design, preliminary measurements and the test of homogeneity of arrays of Josephson junctions.
arxiv pdf

Bimodal Approach for Noise Figures of Merit Evaluation in Quantum-Limited Josephson Traveling Wave Parametric Amplifiers

  1. L. Fasolo,
  2. C. Barone,
  3. M. Borghesi,
  4. G. Carapella,
  5. A. P. Caricato,
  6. I. Carusotto,
  7. W. Chung,
  8. A. Cian,
  9. D. Di Gioacchino,
  10. E. Enrico,
  11. P. Falferi,
  12. M. Faverzani,
  13. E. Ferri,
  14. G. Filatrella,
  15. C. Gatti,
  16. A. Giachero,
  17. D. Giubertoni,
  18. A. Greco,
  19. C. Kutlu,
  20. A. Leo,
  21. C. Ligi,
  22. P. Livreri,
  23. G. Maccarrone,
  24. B. Margesin,
  25. G. Maruccio,
  26. A. Matlashov,
  27. C. Mauro,
  28. R. Mezzena,
  29. A. G. Monteduro,
  30. A. Nucciotti,
  31. L. Oberto,
  32. S. Pagano,
  33. V. Pierro,
  34. L. Piersanti,
  35. M. Rajteri,
  36. A. Rettaroli,
  37. S. Rizzato,
  38. Y. K. Semertzidis,
  39. U. Uchaikin,
  40. and A. Vinante
The advent of ultra-low noise microwave amplifiers revolutionized several research fields demanding quantum-limited technologies. Exploiting a theoretical bimodal description of a linear
phase-preserving amplifier, in this contribution we analyze some of the intrinsic properties of a model architecture (i.e., an rf-SQUID based Josephson Traveling Wave Parametric Amplifier) in terms of amplification and noise generation for key case study input states (Fock and coherents). Furthermore, we present an analysis of the output signals generated by the parametric amplification mechanism when thermal noise fluctuations feed the device.
arxiv pdf