论文标题
找到两个不连贯的光点源的性能贸易关系
Performance-tradeoff relation for locating two incoherent optical point sources
论文作者
论文摘要
用于估计单个参数的最佳量子测量可能彼此不兼容，因此不能共同执行它们。不同参数的估计精度之间的权衡可以以信息后悔为特征 - 渔民信息与其量子限制之间的差异。我们表明，信息缩放 - 贸易关系不仅可以使我们不仅为改善估计质心和分离的关节方案的潜力提供了直观的形象，而且还可以为顺序方案的最佳测量方法提供一些线索。特别是，我们表明，对于两个不连贯的点源，分离很小，分离的最佳测量必须提取几乎没有有关质心的信息，反之亦然。
The optimal quantum measurements for estimating individual parameters might be incompatible with each other so that they cannot be jointly performed. The tradeoff between the estimation precision for different parameters can be characterized by information regret -- the difference between the Fisher information and its quantum limit. We show that the information-regret-tradeoff relation can give us not only an intuitive picture of the potential in improving the joint scheme of estimating the centroid and the separation, but also some clues to the optimal measurements for the sequential scheme. In particular, we show that, for two incoherent point sources with a very small separation, the optimal measurement for the separation must extract little information about the centroid, and vice versa.
