Investigating the performance of RPM JTWPAs by optimizing LC-resonator elements
2025-10-23 16:27
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Resonant phase-matched Josephson traveling-wave parametric amplifiers (RPM JTWPAs) play a key role in quantum
computing and quantum information applications due to their low-noise, broadband amplification, and quadrature
squeezing capabilities. This research focuses on optimizing RPM JTWPAs through numerical optimization of parametrized
resonator elements to maximize gain, bandwidth and quadrature squeezing. Our results show that optimized resonators
can increase the maximum gain and squeezing by more than 5 dB in the ideal noiseless case. However, introducing the
effects of loss through a lumpedelement model reveals that gain saturates with increasing loss, while squeezing modes
degrade rapidly, regardless of resonator optimization. These results highlight the potential of resonator design to
significantly improve amplifier performance, as well as the challenges posed by current fabrication technologies and inherent losses.
