题目：Beating the Optimal Verification of Entangled States via Collective Strategies

报告人：刘烨超 (德国柏林祖思研究所)

时 间：2024年11月13日(周三) 下午 14:00-16:00

地 点：良乡校区 理学楼B405

摘要：

In the realm of quantum information processing, the efficient characterization of entangled states poses an overwhelming challenge, rendering the traditional methods including quantum tomography unfeasible and impractical. To tackle this problem, we propose a new verification scheme using collective strategies, showcasing arbitrarily high efficiency that beats the optimal verification with global measurements. Our collective scheme can be implemented in various experimental platforms and scalable for large systems with a linear scaling on hardware requirement, and distributed operations are allowed. More importantly, the approach consumes only a few copies of the entangled states, while ensuring the preservation of unmeasured ones, and even boosting their fidelity for any subsequent tasks. Furthermore, our protocol provides additional insight into the specific types of noise affecting the system, thereby facilitating potential targeted improvements. These advancements hold promise for a wide range of applications, offering a pathway towards more robust and efficient quantum information processing.

简历：

刘烨超，在7003全讯入口物理学院获得学士和博士学位。2022至2023年在德国锡根大学从事博士后研究，主要工作为纠缠缓存；从2024年起于德国柏林祖思研究所进行基于Frank-Wolfe算法的纠缠探测的博士后研究。他的主要研究兴趣是量子网络、量子纠缠和量子表征。

联系方式：jiangwei.shang@bit.edu.cn

邀请人： 尚江伟

网 址：/

承办单位：物理学院、先进光电量子结构设计与测量教育部重点实验室