Multipartite entanglement is a crucial resource for quantum computing, communication, and metrology. However, detecting this resource can be challenging: for genuine multipartite entanglement it may require global measurements that are hard to implement experimentally. In this study, we introduce the concept of entanglement detection length, defined as the minimum length of observables required to detect genuine multipartite entanglement. We characterize the entanglement detection length for various types of genuinely entangled states, including GHZ-like states, Dicke states, and graph states. We also present a classification of genuinely entangled states based on entanglement detection length. Furthermore, we demonstrate that the entanglement detection length differs from the minimum length of observables needed to uniquely determine a genuinely entangled state. Our findings are valuable for minimizing the number of observables that must be measured in entanglement detection. 

报告人简介

陈霖于2008年获得浙江大学理论物理博士，先后在新加坡国立大学，加拿大滑铁卢大学，和北航数学学院等单位工作。研究方向是量子信息理论，课题包括不可扩展基，非局域性，纠缠理论，量子态区分，无偏基和张量秩等。在CMP，IEEETIT，PRL，Quantum等期刊发表论文多篇，主持国家自然科学基金面上项目等，担任Frontiers in Quantum Science and Technology的审稿编辑等职位，2023年发表于IEEETIT的工作解决了2014年Winter和Linden等人提出的关于矩阵秩的猜想。

https://math.buaa.edu.cn/info/1378/3807.htm; https://www.researchgate.net/profile/Lin-Chen-92

邀请人

王东升 副研究员