Minimum tomography of two entangled qutrits using local measurements of one-qutrit symmetric informationally complete positive operator-valued measure
Minimum tomography of two entangled qutrits using local measurements of one-qutrit symmetric informationally complete positive operator-valued measure
复制标题
使用一量子体对称信息完全正算子值测量的局部测量对两个纠缠量子体进行最小断层扫描
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Pádua
中科院分区：
文献类型：
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作者：
W. Pimenta;B. Marques;T. O. Maciel;R. Vianna;A. Delgado;C. Saavedra;S. Pádua
给出了一种基于四分之一对称信息完全正算子值测度的二分之一态层析成像（SIC-POVM）的实验演示。在自发参量下转换光子对的横向路径中编码了一个二量子态。空间光调制器允许实现必要的81个POVM元件来重构状态。通过将独立测量与用重建状态计算的预测结果进行比较来评估重建的质量。利用二重态重构密度算符的负性和广义鲁棒性计算了系统中的纠缠度。PACS编号：
An experimental demonstration of two-qutrit state tomography via one-qutrit symmetric informationally complete positive operator-valued measure (SIC-POVM) is presented. A two-qutrit state is encoded in the transversal paths of a spontaneous parametric down-converted photon pair. A spatial light modulator allows to implement the necessary 81 POVM elements to reconstruct the state. The quality of the reconstruction is evaluated by comparing independent measurements with the predicted results calculated with the reconstructed state. Entanglement in the system is calculated via negativity and generalized robustness from the two-qutrit reconstructed density operator. PACS numbers: