报告题目：Optimal Strategies of Quantum Metrology with a Strict Hierarchy

时间：2022.2.20  15:30—17:00

地点：3号楼6楼会议室

报告人简介：

Haidong Yuan received his B.E. in Electronic Engineering from Tsinghua University, Beijing, China, He received his M.A. in Engineering science and Ph.D. in Applied Mathematics from Harvard University. He did his postdoctoral work at Harvard University and Massachusetts Institute of Technology. From 2012 to 2014 he was an assistant professor at the department of Applied Mathematics, the Hong Kong Polytechnic University. He is with the department of Mechanical and Automation Engineering, the Chinese University of Hong Kong since Sep 2014. His current research interests include quantum control, quantum metrology and quantum computation. 

报告摘要：

One of the main quests in quantum metrology is to determine the ultimate precision limit with given resources, where the resources are not only of the number of queries, but more importantly of the allowed strategies. With the same number of queries, the restrictions on the strategies constrain the achievable precision. In this work, we establish a framework to systematically determine the ultimate precision limit of different strategies, which include the parallel, the sequential and the indefinite-causal-order strategies. With this framework, we show there exists a hierarchy of the precision limits under different families of strategies. An efficient algorithm to design an optimal strategy compatible with given constraints is provided, which has immediate practical applications.

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