论文标题
最佳剂量限制相估计而无需纠缠
Optimal Dose-Limited Phase Estimation without Entanglement
论文作者
论文摘要
相位估计是量子计量学最重要的方面之一，其应用在感应，显微镜和量子计算中。当估计有损培养基中的相移时，每个通过相移发送的粒子可达到的信息上有一个上限。以前，仅显示纠缠增强的测量可以使该结合饱和。我们引入了一个测量方案，该方案可以使界限饱和而不依赖纠缠。
Phase estimation is one of the most important facets of quantum metrology, with applications in sensing, microscopy, and quantum computation. When estimating a phase shift in a lossy medium, there is an upper bound on the attainable information per particle sent through the phase shift. Previously, only entanglement-enhanced measurements have been shown to saturate this bound. We introduce a measurement scheme which can saturate the bound without relying on entanglement.
