报告人简介：

杜拴平，厦门大学数学科学学院教授。主要从事算子空间上的映射及其在量子信息领域应用方面的研究，在 Physical Review A、Annals of Physics、Linear Algebra and Its Applications等 SCI 核心期刊发表论文40余篇。主持完成国家自然科学基金及省部级项目多项，目前主持国家自然科学基金面上项目一项，曾获省级自然科学二等奖和三等奖各一项。

报告简介：

Large-scale quantum networks have been employed to overcome practical constraints on transmission and storage for single entangled systems. The deterministic preparation of entangled states is one of the key factors for the realization of quantum networks. There is no efficient method to verify whether single multipartite entanglement can be prepared by multisource quantum networks. Here, we theoretically analyze under what conditions entangled states can be prepared in three kinds of basic Gaussian quantum networks, named triangle networks, star-shaped networks, and chain-type networks. Some necessary criteria are derived for all preparable entangled Gaussian states in such networks. They show that the network structure imposes strong constraints on the set of preparable entangled Gaussian states, which is fundamentally different from standard single multipartite entanglement. This study takes the first step towards understanding the network mechanism for preparing entangled Gaussian states.