Josephson Traveling Wave Parametric Amplifiers as Quantum Source of Entangled Photons for Microwave Quantum Radar Applications

Josephson Traveling Wave Parametric Amplifiers (TWPAs) have the potential of offering quan tum limited noise and large bandwidth. These amplifiers are based on the parametric amplification of microwaves traveling through a transmission line with embedded nonlinear elements. In this paper, the design, fabrication, and characterization of the Josephson Traveling Wave Parametric Amplifier (JTWPA), based on QED devices, as a non-classical quantum source for generating signal-idler en tangled state are presented. The cryogenic and room temperature experimental results for a JTWPA will be reported. The performance comparison of the JTWPA-based Microwave Quantum Radar in terms of Range vs SNR are reported showing that a long range MQR can be obtained.