Observation of the performance enhancement of a non-degenerate JPA versus degenerate JPA in a QTMS radar simulation

Abstract

Small differences in the types of Josephson parametric amplifiers (JPAs) can cause significant changes in quantum two-mode squeezed (QTMS) radars. In this work, taking into account these differences, we examine two types of JPA in terms of pumping in the quantum radar, including degenerate JPA (DJPA) and non-degenerate JPA (NDJPA) under the same conditions, leading to results very significant for the design of a QTMS radar. This study shows that QTMS radar performance is better than that of the DJPA scenario when using the NDJPA scenario. In addition, we calculated the signal-to-noise (SNR) ratio and receiver operating characteristic (ROC) for two scenarios, both of which show the superiority of the NDJPA scenario. The SNR of the QTMS radar in the NDJPA case is about 1.7 dB higher than in the DJPA case. In addition, the channel number of detection probability in the NDJPA scenario is lower than that in the DJPA scenario, which indicates better ROC performance. Finally, using an NDJPA in a quantum radar can achieve a performance improvement over a quantum radar using a DJPA.