报告题目：Non-Markovian Quantum Sensing

报 告 人：吴威 博士 兰州大学研究员

研究方向：量子信息与量子光学，主要关注与量子耗散系统动力学相关的物理问题。

报告时间：2022年1月5日上午10：00-11:00

报告地点：量子楼410会议室

报告摘要：

Quantum sensing explores protocols using certain quantum resources, such as entanglement, quantum squeezing and quantum criticality, to achieve a highly sensitive measurementof physical quantities. The conventional schemes generally use a unitary rotation to encode the quantityof interest into the sensor’s state. However, such a unitary encoding scheme totally breaks down when one measures the spectral density of a quantum reservoir. To solve the above problem, we propose a nonunitary-encoding scheme to realize thenon-Markoviansensing of a quantum reservoir. Although the nonunitary dynamics shall result in the deteriorationof quantum coherence, wesurprisingly find a mechanism, which is due to the formation of a sensor-reservoir bound state, to make the encoding time as a resource to improve the sensing precision. Enriching the family of quantum sensing, our scheme gives an efficient way tomeasure the quantum reservoir and might supply an insightful support to decoherence control.

个人简历：

吴威，兰州大学青年研究员，硕士生导师。2016年毕业于浙江大学近代物理中心，获理学博士学位，2016年8月到2018年12月，在北京计算科学研究中心从事博士后研究。研究方向为量子信息与量子光学，主要关注与量子耗散系统动力学相关的物理问题。目前，已发表学术论文30余篇，主持两项博士后基金和一项青年基金。