论文标题
光子层析成像的效率受纤维衰减影响
Efficiency of photonic state tomography affected by fiber attenuation
论文作者
论文摘要
在本文中，我们研究了在纤维衰减存在下光子状态断层扫描的效率。光子损失的理论形式主义是通过实施开放量子系统理论的方法提供的。量子状态是根据对对称信息完整的POVM获得的光子计数重建的。到达检测器的光子数量是通过二项式分布来建模的，该分布描述了介质引起的光损失。这种方法使我们能够研究状态断层扫描的质量与纤维的长度。特别是，我们专注于通过不同长度的纤维发送的纠缠量子和Qutrits。测量方案检测到的纠缠量被量化并显示在图上。结果表明，光子断层扫描的质量如何取决于源和接收器之间的距离。
In this article, we investigate the efficiency of photonic state tomography in the presence of fiber attenuation. The theoretical formalism of the photon loss is provided by implementing methods from the theory of open quantum systems. The quantum state is reconstructed from photon counts obtained for symmetric informationally complete POVMs. The number of photons that reach the detectors is numerically modeled by the binomial distribution, which describes the loss of light caused by the medium. This approach allows us to study the quality of state tomography versus the length of the fiber. In particular, we focus on entangled qubits and qutrits, which are sent through fibers of different lengths. The amount of entanglement detected by the measurement scheme is quantified and presented on graphs. The results demonstrate how the quality of photonic tomography depends on the distance between the source and the receiver.
