量子导引是介于量子纠缠和贝尔非局域性之间的一种特殊的量子资源，在基本物理问题的探索和量子信息处理中具有重要意义。量子导引的不对称性导致了量子导引的单向性，因此它在单方设备无关的量子通信、量子秘密共享和安全量子隐形传态等方面具有潜在的应用。本项目瞄准量子通信网络中的关键问题，聚焦量子导引网络的构建，开展研究工作。我们拟以实验制备的两组份和多组份纠缠态为基础，结合联合测量和经典信道，实验实现两组份和多组份高斯量子导引交换。在此基础上，本项目拟进一步开展基于测量设备无关的连续变量量子导引的实验研究，结合测量设备无关的相关技术，实现高斯量子导引在损耗通道中的传输；研究量子导引随传输距离的变化规律；探索提高测量设备无关量子导引能力的有效途径。本项目将推进量子导引在量子通信网络中的应用研究。

Quantum steering is an important quantum resource between quantum entanglement and Bell non-locality. It is of great significance in the exploration of fundamental physical problem and quantum information processing. The inherent asymmetry lead to one-way steering, so it has potential application in one-sided device-independent quantum communication, quantum secret sharing and secure quantum teleportation. This project aims at the key problems in the quantum communication network and focuses on the construction of the quantum steering network. Based on the bipartite and multipartite entangled states, and combined with the joint measurement and the classical channel, we plan to demonstrate the feasibility of swapping between two Einstein-Podolsky-Rosen states and between two tripartite entangled states. Furthermore, this project intends to carry out experimental research on measurement-device-independence quantum steering with continuous variables by combining with related technologies, and realizes the transmission of Gaussian quantum steering in loss channel. We will study the dependence of quantum steering on transmission distance, and explore an effective way to improve the steerability. Our research will promote the application of quantum steering in quantum communication network.