量子目标测距中的能量问题
Energetic Considerations in Quantum Target Ranging
摘要：
虽然量子照明（QI）可以在目标检测中提供量子增强，但其执行目标测距的潜力仍不清楚。由于其能力取决于返回信号和其保留的空闲信号之间的联合测量，未知的返回时间使得基于QI的协议难以实现。本文概述了一种潜在的基于量子干涉的量子目标测距方法，该方法基于多量子假设检验和量子增强信道定位（CPF）的最新发展。将CPF应用于时间仓，可以找到量子目标测距的错误概率的上限。然而，使用精力充沛的考虑，我们表明，对于这样一个计划的量子优势可能无法实现物理。
英文摘要：
While quantum illumination (QI) can offer a quantum-enhancement in target detection, its potential for performing target ranging remains unclear. With its capabilities hinging on a joint-measurement between a returning signal and its retained idler, an unknown return time makes a QI-based protocol difficult to realise. This paper outlines a potential QI-based approach to quantum target ranging based on recent developments in multiple quantum hypothesis testing and quantum-enhanced channel position finding (CPF). Applying CPF to time bins, one finds an upper-bound on the error probability for quantum target ranging. However, using energetic considerations, we show that for such a scheme a quantum advantage may not physically be realised.
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