光学轨道角动量复用纠缠源的实验产生及其应用

Experimental generation of optical orbital-angular-momentum multiplexed entanglement and its applications

光既可以携带自旋角动量,也可以携带轨道角动量。自1992年由Allen等提出光学轨道角动量的基本概念以来,光学轨道角动量已吸引了越来越多学者的研究兴趣。光学轨道角动量具有无限带宽以及不同模式相互正交等特点,这使得通过光学轨道角动量来传递信息变成一项十分有前景的技术。在概述光学轨道角动量基本概念的基础上,重点综述了在连续变量系统中利用四波混频过程制备光学轨道角动量复用的纠缠源,包括13对复用的连续变量纠缠确定性产生、9组光学轨道角动量复用的三组份纠缠的制备、基于66个光学轨道角动量模式的大规模量子网络的实现,以及光学轨道角动量复用纠缠源的最新应用,包括利用光学轨道角动量复用的连续变量纠缠实现9通道全光量子隐形传态以及光学轨道角动量复用型量子密集编码。

Optical beam can carry both spin angular momentum and orbital angular momentum. Since its concept was proposed by Allen et al in 1992, optical orbital angular momentum has attracted more and more interests. Optical orbital angular momentum has the characteristics of infinite bandwidth and orthogonal modes, which makes it a promising technology to transmit information. Firstly, the basic concept of optical orbital angular momentum is summarized. And then the generation of orbital-angular-momentum multiplexed entanglement source based on four-wave mixing process in continuous variable system is mainly reviewed, including the deterministic generation of 13 pairs of multiplexed continuous variable entanglement, the implementation of 9 sets of orbital-angular-momentum multiplexed tripartite entanglement and the realization of large-scale quantum network over 66 orbital angular momentum optical modes. Furthermore, the latest application of optical orbital angular momentum multiplexing entanglement source is also introduced, including the realization of 9 channels of all-optical quantum teleportation by utilizing the orbital-angular-momentum multiplexed continuous variable entanglement and the experimental implementation of the orbital-angular-momentum multiplexed quantum dense coding.