物理学院学术报告（第39期）

报告题目：Quantum metrology: Principle, applications, and challenges

报告专家：安钧鸿教授    兰州大学

报告时间：2024年07月04日（周四）9:00

报告地点：理6栋220       邀请人：颜辉

报告内容：

Quantum metrology pursues the realization of higher-precision measurements to physical quantities than the classically achievable limits by exploiting quantum features, such as quantum entanglement and squeezing, as resources. It has potential application in developing next-generation frequency standard, magnetometer, radar, and navigation. However, the ubiquitous decoherence in quantum world degrades the quantum resources and forces the precision not only to reduce to the shot-noise limit at an optimal encoding time but also to become divergent in the long-time condition. This is called the no-go theorem of noisy quantum metrology and dramatically hinders its application. Therefore, how to realize the promised performance of quantum metrology is a key issue in our present noisy intermediate-scale quantum era.   In this talk, I will first introduce the principle of quantum metrology. Then I will review the applications and challenges of quantum metrology. Finally, I will report our studies on overcoming the no-go theorem of noisy quantum metrology by Floquet engineering.

专家简介：

安钧鸿，2005年在兰州大学获博士学位并留校工作。2006年至2014年相继在台湾成功大学和新加坡国立大学从事博士后、研究员、访问研究员；2011年受聘为教授；2013年入选教育部新世纪优秀人才支持计划；2016年入选甘肃省飞天学者；2017年入选中央军委科技委国防科技创新特区主题专家组专家；2019年入选国家“万人计划”青年拔尖人才和中科院青年创新促进会特邀会员；2021年入选甘肃省领军人才。从事开放量子系统的退相干控制和非平衡拓扑相变等量子物理基础问题研究。