Wang Hong-Fu, Zhang Shou, Zhu Ai-Dong, Yi X X, Yeon Kyu-Hwang
Department of Physics, Yanbian University, Yanji, Jilin, China.
Opt Express. 2011 Dec 5;19(25):25433-40. doi: 10.1364/OE.19.025433.
We propose a linear-optics-based scheme for local conversion of four Einstein-Podolsky-Rosen photon pairs distributed among five parties into four-photon polarization-entangled decoherence-free states using local operations and classical communication. The proposed setup involves simple linear optical elements and non-photon-number-resolving detectors that can only distinguish between the presence and absence of photons, and no information on the exact number of photons can be obtained. This greatly simplifies the experimental realization for linear optical quantum computation and quantum information processing.
我们提出了一种基于线性光学的方案，用于通过本地操作和经典通信，将五个参与方之间分布的四个爱因斯坦-波多尔斯基-罗森光子对局部转换为四光子偏振纠缠无退相干态。所提出的设置涉及简单的线性光学元件和仅能区分光子是否存在的非光子数分辨探测器，无法获得关于光子确切数量的信息。这极大地简化了线性光学量子计算和量子信息处理的实验实现。
