Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables
Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables
复制标题
用于表征连续变量中时间复用高维量子纠缠的直接时间模式测量
DOI：
10.1103/physrevlett.124.213603
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发表时间：
2020
影响因子：
8.6
通讯作者：
Z. Y. Ou
中科院分区：
文献类型：
--
作者：
Nan Huo;Yuhong Liu;Jiamin Li;Liang Cui;Xin Chen;Rithwik Palivela;Tianqi Xie;Xiaoying Li;Z. Y. Ou
光场的正交场时间模分析是近年来发展起来的一种新的量子信息学框架。然而，到目前为止，时间模式的确切轮廓尚不清楚，这给模式选择和解复用带来了困难。在这里，我们报告了一种新的方法，直接测量时间模式的准确形式。这反过来又使我们能够用模式匹配的本地振荡器进行模式正交零差检测。我们将该方法应用于脉冲泵浦的特殊工程光纤参数放大器，并演示了电信波长中连续变量的时间多维量子纠缠。时间模式表征技术可以推广到其他脉冲激励系统，以求出它们的本征模式，以便在时间域中进行多路复用。
Field-orthogonal temporal mode analysis of optical fields has recently been developed for a new framework of quantum information science. However, so far, the exact profiles of the temporal modes are not known, which makes it difficult to achieve mode selection and demultiplexing. Here, we report a novel method that measures directly the exact form of the temporal modes. This, in turn, enables us to make mode-orthogonal homodyne detection with mode-matched local oscillators. We apply the method to a pulse-pumped, specially engineered fiber parametric amplifier and demonstrate temporally multiplexed multidimensional quantum entanglement of continuous variables in telecom wavelength. The temporal mode characterization technique can be generalized to other pulse-excited systems to find their eigenmodes for multiplexing in the temporal domain.