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

Autor:	Levochkina, A. Yu., Ahmad, H. G., Mastrovito, P., Chatterjee, I., Serpico, G., Di Palma, L., Ferroiuolo, R., Satariano, R., Darvehi, P., Ranadive, A., Cappelli, G., Gal, G. Le, Planat, L., Montemurro, D., Massarotti, D., Tafuri, F., Roch, N., Pepe, G. P., Esposito, M.
Rok vydání:	2024
Předmět:	Quantum Physics
Druh dokumentu:	Working Paper
Popis:	Traveling Wave Parametric Amplifiers (TWPAs) are extensively employed in experiments involving weak microwave signals for their highly desirable quantum-limited and broadband characteristics. However, TWPAs' broadband nature comes with the disadvantage of admitting the activation of spurious nonlinear processes, such as harmonics generation, that can potentially degrade amplification performance. Here we experimentally investigate a Josephson TWPA device with SNAIL (Superconducting Nonlinear Asymmetric Inductive Element)-based unit cells focusing on the amplification behaviour along with the generation of second and third harmonics of the pump. By comparing experimental results with transient numerical simulations, we demonstrate the influence of Josephson junctions' fabrication imperfections on the occurrence of harmonics and on the gain behaviour. Comment: typos fixed
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2405.20096 Zobrazit plný text záznamu View this record from Arxiv