Modeling Flux Tunability in Josephson Traveling Wave Parameteric Amplifiers With an Open-Source Frequency-Domain Simulator
Anno: 2025
Autori: Levochkina A., Chatterjee I., Darvehi P., Ahmad HG., Mastrovito P., Massarotti D., Montemurro D., Tafuri F., Pepe GP., O’Brien KP., Esposito M.
Affiliazione autori: Univ Federico II, Dept Phys, I-80126 Naples, Italy; CNR SPIN, Complesso Monte S Angelo, I-80126 Naples, Italy; Univ Federico II, Dept Elect Engn Informat Technol, I-80125 Naples, Italy; CNR INO, I-50125 Florence, Italy; MIT, Dept Elect Engn Comp Sci, Cambridge, MA 02139 USA.
Abstract: Josephson traveling wave parameteric amplifiers (JTWPAs) are integral parts of many experiments carried out in quantum technologies. Being composed of hundreds of Josephson junction-based unit cells, such devices exhibit complex nonlinear behavior that typically cannot be fully explained with simple analytical models, thus necessitating the use of numerical simulators. A very useful characteristic of JTWPAs is the possibility of being biased by an external magnetic flux, allowing in-situ control of the nonlinearity. It is, therefore, very desirable for numerical simulators to support this feature. Open-source numerical tools that allow to model JTWPA flux biasing, such as WRSPICE or PSCAN2, are based on time-domain approaches, which typically require long simulation times to get accurate results. In this work, we model the gain performance in a prototypical flux-tunable JTWPA by using JosephsonCircuits.jl, a recently developed frequency-domain open-source numerical simulator, which has the benefit of simulation times about 10 000 faster than time-domain methods. By comparing the numerical and experimental results, we validate this approach for modeling the flux dependent behavior of JTWPAs.
Giornale/Rivista: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume: 35 (3) Da Pagina: 601006-1 A: 601006-6
Maggiori informazioni: This work was supported in part by the European Union through the Horizon Europe2021-2027 Framework Program under Gra nt 101080152, in part by the Horizon2020 Research and Innovation Programme under Grant 731473 and Grant 101017733, in part by the PNRR MUR Project under Grant PE0000023-NQSTI,in part by the MUR Project PRIN 2022 CUP under Grant E53D23001910006(Super NISQ), in part by the PNRR MUR Project under Grant CN00000013-ICSC, and in part by the European Union Next Generation EU, Mission 4,Component 1 under Grant CUP PE0000023-NQSTI.Parole chiavi: Josephson traveling wave parameteric amplifier (JTWPA); Julia; JosephsonCircuits.jl; Josephson traveling wave parameteric amplifier (JTWPA); Julia; JosephsonCircuits.jlDOI: 10.1109/TASC.2025.3552432
