应兰州大学物理学院吴威老师邀请，北京计算科学研究中心房一楠博士后举办线上学术报告。欢迎广大师生届时参加！

题目：Quantum sensing enhanced by periodic quantum controls

报告人：房一楠 博士

时间：2020年08月17日下午14:00

线上地点：腾讯会议（会议 ID：604 241 900   会议密码：890511）

会议地址：https://meeting.tencent.com/s/SWqX1HOZZCQh

联系人：吴威

摘要：Quantum sensing amounts to use quantum resources such as entanglement or coherence to boost the precision when estimates a quantity of interest using a quantum probe. The quantity could itself be a classical signal that coupled to the probe, or a physical property from another quantum target who interacts with the probe. In this later while ubiquitous scenario, even with the quantum aid the absence of direct access to the target may still hinder or significantly reduce the achievable precision. In a recent study, we have explored a particular example of this type, consisting of a qubit coupled to an oscillator, by using the generic frame of quantum metrology. Our results highlight the constructive role of periodic quantum controls in achieving favorable precision scaling with respect to the probe’s coherence time. We also proposed an adaptive sensing protocol to realize the predicted enhancement. Finally, we supplied our main results with detailed discussions on the effect of environmental noise as well as uncertainties in prior knowledge about the sensing quantity.

个人简介：房一楠，男，1988年11月生，2017年博士毕业于中国科学院理论物理研究所，随后在北京计算科学研究中心以及加拿大麦吉尔大学从事博士后研究，现北京计算科学研究中心博士后。主要研究方向为固态量子计算、量子计量学、以及量子生物学。