论文标题
通过量子增强感测的量子照明
Quantum illumination via quantum-enhanced sensing
论文作者
论文摘要
量子增强的传感的目标是通过输入量子状态增强参数灵敏度，而量子照明的目标是在重噪声环境中使用输入纠缠状态增强目标检测能力。在这里，我们提出了量子增强的传感和量子照明之间的串联，该量子可以比经典限制具有量子优势。首先，通过量子Fisher信息连接到干涉仪中的相位传感。其次，在嘈杂的量子增强传感中研究了目标灵敏度。例如，在相同的输入状态能量下，N-Photon纠缠状态可以表现出比两种模式挤压真空状态和可分离的相干状态更好的性能。结合了光子数差的测量值，最后，嘈杂的目标灵敏度与信噪比相关，这与区分目标存在和不存在的最小误差概率有关。我们表明，随着热噪声的增加，目标灵敏度和信噪比都可以增强。
Quantum-enhanced sensing has a goal of enhancing a parameter sensitivity with input quantum states, while quantum illumination has a goal of enhancing a target detection capability with input entangled states in a heavy noise environment. Here we propose a concatenation between quantum-enhanced sensing and quantum illumination that can take quantum advantage over the classical limit. First, phase sensing in an interferometry is connected to a target sensing via quantum Fisher information. Second, the target sensitivity is investigated in noisy quantum-enhanced sensing. Under the same input state energy, for example, N-photon entangled states can exhibit better performance than a two-mode squeezed vacuum state and a separable coherent state. Incorporating a photon-number difference measurement, finally, the noisy target sensitivity is connected to a signal-to-noise ratio which is associated with a minimum error probability of discriminating the presence and absence of the target. We show that both the target sensitivity and the signal-to-noise ratio can be enhanced with increasing thermal noise.
