We propose a method to design a suboptimal, coherent quantum LQG controller to solve a quantum equalization problem. Our method involves reformulating the problem as a control problem and then designing a classical LQG controller and implementing it as a quantum system. Illustrative examples are included which demonstrate the algorithm for both active and passive systems, i.e., systems where the dynamics are described in terms of both position and momentum operators and systems with dynamics in terms of annihilation operators only.
Learning-Based Design of LQG Controllers in Quantum Coherent Feedback
University of New South Wales（新南威尔士大学）；University of Newcastle（纽卡斯尔大学）；University of Duisburg-Essen（杜伊斯堡-埃森大学）；The Hong Kong Polytechnic University（香港理工大学）；Shenzhen Research Institute, The Hong Kong Polytechnic University（香港理工大学深圳研究院）；University of Technology Sydney（悉尼科技大学）
A two-disk approach to the synthesis of coherent passive equalizers for linear quantum systems
School of Engineering and Technology, University of New South Wales（新南威尔士大学工程与技术学院）；School of Engineering, Australian National University（澳大利亚国立大学工程学院）
Digital Signal Processing from Classical Coherent Systems to Continuous-Variable QKD: A Review of Cross-Domain Techniques, Applications, and Challenges
QuIIN – Quantum Industrial Innovation EMBRAPII Competence Center CIMATEC in Quantum Technologies（QuIIN–量子工业创新EMBRAPII能力中心CIMATEC量子技术）；SENAI CIMATEC；Federal University of Bahia（巴伊亚联邦大学）
