论文标题
演示纠缠增强的秘密感应
Demonstration of Entanglement-Enhanced Covert Sensing
论文作者
论文摘要
量子物理的定律赋予信息处理的卓越性能和安全性：量子传感利用非经典资源，以实现经典感应的测量精度，而量子密码学则旨在无条件地保护处理已处理的信息的保密。在这里，我们介绍了纠缠增强的秘密传感的理论和实验，该范例同时通过在环境噪声背景中隐藏探针信号来提供高度测量精度和数据完整性，以使协议的执行是不可检测的，具有很高的概率。我们表明，与在相同的秘密性级别的经典协议相比，纠缠在估算探测器对象的估算阶段时提供了绩效提升。实施的纠缠增强的秘密传感协议通过其接近最佳的纠缠源和量子接收器而接近基本量子限制。我们的工作有望在前所未有的安全性和绩效水平上创造足够的量子信息处理机会。
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.
