Beating the optimal verification of entangled states via collective strategies

主 讲 人 ：尚江伟    研究员

活动时间：11月23日15时30分    

地      点 ：理科群2号楼A408

讲座内容：

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.

主讲人介绍：

尚江伟，北京理工大学物理学院研究员/长聘副教授、博士生导师。2010年本科毕业于新加坡国立大学物理系并获得理学一等荣誉学位，2014年在新加坡国立大学量子科技研究中心获得博士学位，2014年到2017年先后在新加坡量子科技研究中心和德国锡根大学物理系进行博士后研究。2018年初加入北京理工大学物理学院，研究方向为量子信息和量子计算，主要包括量子层析、量子验证、非局域关联、算法的研究等。已在包括 Physical Review Letters、Nature Communications，npj Quantum Information等学术期刊上发表论文三十余篇。现任Quantum，J. Phys. A: Math. Theor.，Int. J. Quantum Inf.等SCI期刊编委。

发布时间：2024-11-20 14:50:02