论文标题
局部随机测量的混合状态纠缠
Mixed-state entanglement from local randomized measurements
论文作者
论文摘要
我们提出了一种基于估计部分转座密度矩阵的估计矩，在多体混合状态下检测二分纠缠的方法。估计值是通过在状态上执行局部随机测量的，然后使用经典阴影框架进行后处理。我们的方法可以应用于具有单品控制的任何量子系统。我们对所需数量的实验运行进行了详细分析，并使用现有的实验数据[Brydges等，Science 364，260（2019）]进行了协议。
We propose a method for detecting bipartite entanglement in a many-body mixed state based on estimating moments of the partially transposed density matrix. The estimates are obtained by performing local random measurements on the state, followed by post-processing using the classical shadows framework. Our method can be applied to any quantum system with single-qubit control. We provide a detailed analysis of the required number of experimental runs, and demonstrate the protocol using existing experimental data [Brydges et al, Science 364, 260 (2019)].
