论文标题
无怠速渠道位置查找
Idler-free channel position finding
论文作者
论文摘要
纠缠是量子传感的强大工具，纠缠状态可以极大地提高协议的判别能力，以实现量子照明，量子计量学或量子读数。但是，纠缠的状态协议通常需要保留惰性状态，该状态纠缠于探针。存储量子状态很困难，因此技术限制可以使需要量子记忆不可行的协议。一种替代方法是使用非经典资源但不需要存储任何闲置状态的无怠速协议。在这里，我们将这种协议应用于渠道位置查找的任务。这涉及在一系列背景通道中找到目标通道，并具有许多应用，包括量子传感，量子光谱和量子读数。
Entanglement is a powerful tool for quantum sensing, and entangled states can greatly boost the discriminative power of protocols for quantum illumination, quantum metrology, or quantum reading. However, entangled state protocols generally require the retention of an idler state, to which the probes are entangled. Storing a quantum state is difficult and so technological limitations can make protocols requiring quantum memories impracticable. One alternative is idler-free protocols that utilise non-classical sources but do not require any idler states to be stored. Here we apply such a protocol to the task of channel position finding. This involves finding a target channel in a sequence of background channels, and has many applications, including quantum sensing, quantum spectroscopy, and quantum reading.
