Investigating pump harmonics generation in a SNAIL-based Traveling Wave Parametric Amplifier

  1. A. Yu. Levochkina,
  2. H. G. Ahmad,
  3. P. Mastrovito,
  4. I. Chantarjee,
  5. G.Serpico,
  6. L. Di Palma,
  7. R. Ferroiuolo,
  8. R. Satariano,
  9. P. Darvehi,
  10. A. Ranadive,
  11. G. Cappelli,
  12. G. Le Gal,
  13. L. Planat,
  14. D. Montemurro,
  15. D. Massarotti,
  16. F. Tafuri,
  17. N. Roch,
  18. G.P. Pepe,
  19. and M. Esposito
Traveling Wave Parametric Amplifiers (TWPAs) are extensively employed in experiments involving weak microwave signals for their highly desirable quantum-limited and broadband characteristics.

Magnetic-field dependence of a Josephson traveling-wave parametric amplifier and integration into a high-field setup

  1. L. M. Janssen,
  2. G. Butseraen,
  3. J. Krause,
  4. A. Coissard,
  5. L. Planat,
  6. N. Roch,
  7. G. Catelani,
  8. Yoichi Ando,
  9. and C. Dickel
We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave parametric amplifier (TWPA). We show that the observed change in photonic bandgap and plasma

Fast high fidelity quantum non-demolition qubit readout via a non-perturbative cross-Kerr coupling

  1. R. Dassonneville,
  2. T. Ramos,
  3. V. Milchakov,
  4. L. Planat,
  5. É. Dumur,
  6. F. Foroughi,
  7. J. Puertas,
  8. S. Leger,
  9. K. Bharadwaj,
  10. J. Delaforce,
  11. K. Rafsanjani,
  12. C. Naud,
  13. W. Hasch-Guichard,
  14. J.J. García-Ripoll,
  15. N. Roch,
  16. and O. Buisson
Qubit readout is an indispensable element of any quantum information processor. In this work we propose an original coupling scheme between qubit and cavity mode based on a non-perturbative

Quantum trajectories of superconducting qubits

  1. S. J. Weber,
  2. K. W. Murch,
  3. M. E. Schwartz,
  4. N. Roch,
  5. and I. Siddiqi
In this review, we discuss recent experiments that investigate how the quantum sate of a superconducting qubit evolves during measurement. We provide a pedagogical overview of the measurement

A V-shape superconducting artificial atom based on two inductively coupled transmons

  1. É. Dumur,
  2. B. Küng,
  3. A. K. Feofanov,
  4. T. Weissl,
  5. N. Roch,
  6. C. Naud,
  7. W. Guichard,
  8. and O. Buisson
Circuit quantum electrodynamics systems are typically built from resonators and two-level artificial atoms, but the use of multi-level artificial atoms instead can enable promising