Bimodal Approach for Noise Figures of Merit Evaluation in Quantum-Limited Josephson Traveling Wave Parametric Amplifiers
Luca Fasolo, C. Barone, M. Borghesi, Giovanni Carapella, Anna Paola Caricato, Iacopo Carusotto, Woohyun Chung, Alessandro Cian, Daniele Di Gioacchino, Emanuele Enrico, P. Falferi, M. Faverzani, E. Ferri, Giovanni Filatrella, Claudio D. Gatti, Andrea Giachero, D. Giubertoni, Angelo Greco, Çağlar Kutlu, Angelo Leo · IEEE Transactions on Applied Superconductivity · 2022
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 coherent). Furthermore, we present an analysis of the output signals generated by the parametric amplification mechanism when thermal noise fluctuations feed the device.