One-shot detection limits of time-alignment two-photon illumination radar  

作　　者：高文珑 许录平 张华 阎博 李芃鲜 胡桂廷 Wen-Long Gao;Lu-Ping Xu;Hua Zhang;Bo Yan;Peng-Xian Li;Gui-Ting Hu(School of Aerospace Science and Technology,Xidian University,Xi’an 710126,China)

机构地区：[1]School of Aerospace Science and Technology,Xidian University,Xi’an 710126,China

出　　处：《Chinese Physics B》2023年第5期245-253,共9页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.62071363);the Key Research and Development Program of Shaanxi Province,China(Grant No.2021LLRH-06)。

摘　　要：Quantum radar has recently gained increasing importance in a number of military applications.The estimation accuracy of one-shot quantum illumination events is significant in target detection.However,the accuracy is inevitably deteriorated by measurement noises.The traditional one-shot illumination emits a single photon towards a certain area which thermal noise exists in the path to,and the states of the received photons are hard to distinguish in the following processing.Therefore,a new optical probe source is proposed in this work.The independent detecting unit in the enhanced illumination is comprised of two photons aligned in time by using Hong–Ou–Mandel(HOM)interferometer.Further,oneshot detection in a general discrete model is realized and it proves a significant promotion in accuracy.The expansion of useful parts in parameter space and the lower minimal error probability for hypothesis testing have been mathematically demonstrated.The accuracy of one-shot detection can be effectively improved by the proposed scheme implying that it possesses great potential applications in quantum illumination and imaging.

关 键 词：quantum information quantum optics PHOTONIC 

分 类 号：TN958[电子电信—信号与信息处理]