论文标题
使用光子分辨检测器对高斯通道的最佳表征
Optimal characterization of Gaussian channels using photon-number-resolving detectors
论文作者
论文摘要
我们根据光子数量测量，用于高斯州层析成像和高斯工艺断层扫描，提出最佳方案。 $ n $ mmode高斯状态完全由$ 2 n^2+3n $参数指定。我们的方案需要$ 2 N^2+3n $不同的光子数量测量来确定状态，因此是最佳的。此外，我们描述了一种最佳方案，以使用连贯的状态探针和光子数测量值来表征高斯过程。随着光子数量测量实验技术的最新进展，我们希望我们的方案在各种量子信息处理方案中有用，包括纠缠检测，量子计算，量子键分布和量子传送。这项工作建立在Parthasarathy等人的作品依据。 [Infin。尺寸。肛门。量子概率。 relat。 TOP。，18（4）：1550023，21，2015]。
We present optimal schemes, based on photon number measurements, for Gaussian state tomography and for Gaussian process tomography. An $n$-mode Gaussian state is completely specified by $2 n^2+3n$ parameters. Our scheme requires exactly $2 n^2+3n$ distinct photon number measurements to tomograph the state and is therefore optimal. Further, we describe an optimal scheme to characterize Gaussian processes by using coherent state probes and photon number measurements. With much recent progress in photon number measurement experimental techniques, we hope that our scheme will be useful in various quantum information processing protocols including entanglement detection, quantum computation, quantum key distribution and quantum teleportation. This work builds upon the works of Parthasarathy et al. [Infin. Dimens. Anal. Quantum Probab. Relat. Top., 18(4): 1550023, 21, 2015].
