Demonstration of Entanglement-Enhanced Covert Sensing
Demonstration of Entanglement-Enhanced Covert Sensing
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DOI：
10.1103/physrevlett.129.010501
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发表时间：
2022-06-27
影响因子：
8.6
通讯作者：
Zhang, Zheshen
中科院分区：
文献类型：
--
作者：
Hao, Shuhong;Shi, Haowei;Zhang, Zheshen
量子物理定律赋予信息处理上级性能和安全性：量子传感利用非经典资源实现经典传感无法比拟的测量精度，而量子密码则旨在无条件地保护处理信息的机密性。在这里，我们提出的理论和实验的纠缠增强的隐蔽传感，一个范例，同时提供高的测量精度和数据完整性，通过隐藏在环境噪声背景下的探测信号，使协议的执行是不可检测的概率很高。我们表明，纠缠提供了一个性能提升，估计所赋予的相位探测对象相比，在相同的隐蔽性水平的经典协议。所实现的纠缠增强的隐蔽传感协议凭借其接近最佳的纠缠源和量子接收器接近基本量子极限。我们的工作有望为量子信息处理创造前所未有的安全和性能水平的充分机会。
The laws of quantum physics endow superior performance and security for information processing: quantum sensing harnesses nonclassical resources to enable measurement precision unmatched by classical sensing, whereas quantum cryptography aims to unconditionally protect the secrecy of the processed information. Here, we present the theory and experiment for entanglement-enhanced covert sensing, a paradigm that simultaneously offers high measurement precision and data integrity by concealing the probe signal in an ambient noise background so that the execution of the protocol is undetectable with a high probability. We show that entanglement offers a performance boost in estimating the imparted phase by a probed object, as compared to a classical protocol at the same covertness level. The implemented entanglement-enhanced covert sensing protocol operates close to the fundamental quantum limit by virtue of its near-optimum entanglement source and quantum receiver. Our work is expected to create ample opportunities for quantum information processing at unprecedented security and performance levels.