题 目：Non-Markovian Quantum Sensing
报 告 人：吴威，兰州大学
时 间：2023年2月23号（星期四）上午10:30
地 点：腾讯会议：476-958-810
邀 请 人：张瑜瑜
报告摘要：In this talk, I shall introduce our recent works on noisy quantum metrology and quantum sensing. Quantum sensing explores protocols using certain quantum resources, such as entanglement, quantum squeezing and quantum criticality, to achieve a highly sensitive measurement of physical quantities. The conventional schemes generally use a unitary rotation to encode the quantity of 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 the non-Markovian sensing of a quantum reservoir. Although the nonunitary dynamics shall result in the deterioration of quantum coherence, we surprisingly find a mechanism, which is due to the formation of a sensor-reservoir bound state, to recover the encoding time as a resource to improve the sensing precision. Enriching the family of quantum sensing, our scheme gives an efficient way to measure the quantum reservoir and might supply an insightful support to decoherence control.
报告人介绍：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。2019年1月入职兰州大学。研究方向为量子光学与量子信息学，目前主要关注与量子耗散系统动力学相关的量子力学与量子热力学基础问题。目前，已累计发表学术论文40篇，主持两项博士后基金和一项国家自然科学基金。
