论文标题
使用时间分辨检测的时间键量子态的断层扫描
Tomography of time-bin quantum states using time-resolved detection
论文作者
论文摘要
我们提出了一种测量在光子时间模式中编码的量子状态的方法。多级量子状态的基础是通过在这种情况下的光纤中使用模式传播的模式来定义的。传播和时间分辨的单光子检测使我们能够定义一个正面的价值度量（POVM）。 POVM取决于分散量和检测器的特性。该框架通过在大量现实的实验设置上对大量状态进行量子状态层析成像进行数值测试。最后，计算了预期状态和重建状态之间的平均忠诚度，用于Qutrits，Qutrits和纠缠量表。
We present a method for measuring quantum states encoded in the temporal modes of photons. The basis for the multilevel quantum states is defined by the use of modes propagating in a dispersive medium, which is a fiber in this case. The propagation and time-resolved single photon detection allow us to define a positive-operator valued measure (POVM). The POVM depends on the amount of dispersion and the characteristics of a detector. This framework is numerically tested by performing quantum state tomography on a large number of states for a set of realistic experimental settings. Finally, the average fidelity between the expected and reconstructed states is computed for qubits, qutrits and entangled qubits.
