报告题目：New opportunities for sensing via continuous measurement

报告人：杨大猷 博士（德国乌尔姆大学）

报告时间：2023年8月10日（周四）下午4:30

报告地点：光电所二层报告厅

报告摘要：  

The continuous monitoring of driven-dissipative quantum optical systems provides key strategies for the implementation of quantum metrology, with prominent examples ranging from the gravitational wave detectors to the emergent driven-dissipative many-body sensors. Fundamental theoretical questions about the ultimate performance of such a class of sensors remain open—for example, can they achieve quantum-enhanced precision scaling without squeezed input; how to perform the optimal measurement to approach their ultimate precision? In this talk, I will present our recent efforts to answer these questions. In the first part I will introduce dissipative criticality as a resource for nonclassical precision scaling for continuously monitored sensors, by establishing universal scaling laws of the quantum Fisher information in terms of the critical exponents of generic dissipative critical points. In the second part I will present a general continuous measurement strategy to retrieve the full quantum Fisher information of the nonclassical, temporally correlated fields emitted by generic open quantum sensors, thereby to achieve their fundamental precision limit.

个人介绍：

杨大猷，本科毕业于清华大学物理系，之后在奥地利因斯布鲁克大学/奥地利科学院量子信息与量子光学研究所获得博士学位，导师为沃尔夫奖得主、量子信息理论物理学家Peter Zoller教授。2019年至今在德国乌尔姆（Ulm）大学Martin Plenio小组从事博士后研究。