标题： 量子增强噪声雷达 显示英文标题

标题： Quantum-Enhanced Noise Radar

摘要： 我们提出了一种用于量子照明的新协议：一种量子增强的噪声雷达。 一种双模压缩态，它表现出所谓的信号光束和闲置光束之间的连续变量纠缠，被用作雷达系统的输入。 与现有的量子照明提案相比，我们的协议不需要对信号光束和闲置光束进行联合测量。 这大大提高了系统的实用性，例如，消除了存储闲置光束所需的量子内存。 我们在微波频段进行了原理验证实验，直接比较了双模压缩源与一个理想经典噪声源的性能，该经典噪声源达到了相关性的经典极限。 我们发现，即使在存在大量附加噪声和损耗的情况下，量子源的性能仍比经典源高一个数量级。 显示英文摘要

摘要： We propose a novel protocol for quantum illumination: a quantum-enhanced noise radar. A two-mode squeezed state, which exhibits continuous-variable entanglement between so-called signal and idler beams, is used as input to the radar system. Compared to existing proposals for quantum illumination, our protocol does not require joint measurement of the signal and idler beams. This greatly enhances the practicality of the system by, for instance, eliminating the need for a quantum memory to store the idler. We perform a proof-of-principle experiment in the microwave regime, directly comparing the performance of a two-mode squeezed source to an ideal classical noise source that saturates the classical bound for correlation. We find that, even in the presence of significant added noise and loss, the quantum source outperforms the classical source by as much as an order of magnitude.