轨道角动量复用三方纠缠的确定性生成

Deterministic Generation of Orbital-Angular-Momentum Multiplexed Tripartite Entanglement.

作者信息

Li Sijin, Pan Xiaozhou, Ren Yuan, Liu Huanzhang, Yu Sheng, Jing Jietai

机构信息

State Key Laboratory of Precision Spectroscopy, Joint Institute of Advanced Science and Technology, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.

Department of Physics, Zhejiang University, Hangzhou 310027, China.

出版信息

Phys Rev Lett. 2020 Feb 28;124(8):083605. doi: 10.1103/PhysRevLett.124.083605.

DOI:10.1103/PhysRevLett.124.083605

PMID:32167349

Abstract

We demonstrate the experimental generation of orbital angular momentum (OAM) multiplexed multipartite entanglement with cascaded four-wave mixing processes in a continuous variable (CV) system. In particular, we implement the simultaneous generation of 9 sets of OAM multiplexed tripartite entanglement over 27 Laguerre-Gauss (LG) modes, as well as 20 sets of OAM multiplexed bipartite entanglement over 40 LG modes, which show the rich entanglement structure of the system. In addition, we also generate tripartite entanglement of three types of coherent OAM superposition modes. Such OAM multiplexed multipartite entanglement opens the avenue to construct CV parallel quantum network for realizing parallel quantum information protocols.

摘要

我们展示了在连续变量（CV）系统中通过级联四波混频过程实验产生轨道角动量（OAM）复用的多方纠缠。具体而言，我们实现了在27个拉盖尔 - 高斯（LG）模式上同时产生9组OAM复用的三方纠缠，以及在40个LG模式上产生20组OAM复用的两方纠缠，这展示了系统丰富的纠缠结构。此外，我们还产生了三种类型的相干OAM叠加模式的三方纠缠。这种OAM复用的多方纠缠为构建用于实现并行量子信息协议的CV并行量子网络开辟了道路。