时间：2023年4月28日 10:00-11:00

地点：电院群楼2-410室

控制理论在实验量子物理中的有效性

张国峰  

Associate Professor , Hong Kong polytechnic University

摘要:

Kalman decomposition is a standard result in classical linear systems theory. In this talk, we discuss the Kalman canonical form for quantum linear control systems. We show how this structural decomposition can be used to investigate decoherence-free modes, quantum non-demolition variables, and back-action evading phenomenon in quantum linear systems. The proposed theory will be demonstrated by several experiments from quantum optics and opto-mechanical systems, for example:
1.Optomechanical dark mode, Dong et al.,  Science, 338:609--1613, 2012.
2.Quantum backaction evading measurement of collective mechanical modes, Ockeloen-Korppi, et al., Physical Review Letters, 117:140401, 2016.
3.Quantum mechanics–free subsystem with mechanical oscillators, de Lepinay, et al., Science 372:625–629, 2021.
4.Light-mediated strong coupling between a mechanical oscillator and atomic spins 1 meter apart, Karg, Science 369:174–179, 2020.

简介:

Guofeng Zhang received his B.Sc. degree and M.Sc. degree from Northeastern University, Shenyang, China, in 1998 and 2000 respectively. He received a Ph.D. degree in Applied Mathematics from the University of Alberta, Edmonton, Canada, in 2005. During 2005–2006, he was a Postdoc Fellow at the University of Windsor, Windsor, Canada. He joined the School of Electronic Engineering of the University of Electronic Science and Technology of China, Chengdu, China, in 2007. From April 2010 to December 2011 he was a Research Fellow at the Australian National University. He is currently an Associate Professor in the Department of Applied Mathematics at the Hong Kong polytechnic University. His research interests include quantum information and control, and quantum algorithms.