论文标题
来自年轻图的多部分纠缠的计量学检测
Metrological Detection of Multipartite Entanglement from Young Diagrams
论文作者
论文摘要
我们通过用年轻图来表示分区来表征阶观上有用的多部分纠缠。我们得出对年轻图的形状敏感的纠缠见证人，并表明戴森的等级是量子计量学的资源。常见的量词，例如纠缠深度和$ k $ - 分布性，在此方法中包含图表的宽度和高度。正如我们通过分析有关量子Fisher信息和自旋平方系数的已发表数据所说明的那样，我们的方法在实验上可以访问。
We characterize metrologically useful multipartite entanglement by representing partitions with Young diagrams. We derive entanglement witnesses that are sensitive to the shape of Young diagrams and show that Dyson's rank acts as a resource for quantum metrology. Common quantifiers, such as the entanglement depth and $k$-separability are contained in this approach as the diagram's width and height. Our methods are experimentally accessible in a wide range of atomic systems, as we illustrate by analyzing published data on the quantum Fisher information and spin-squeezing coefficients.
