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SEMINARS
Quantum feedback control and filtering problem
时间  Datetime
2018-05-08 15:30 — 17:00 
地点  Venue
Middle Lecture Room
报告人  Speaker
Dr. Nina Amini
单位  Affiliation
CNRS - Centravlesupelec, France
邀请人  Host
林一清
报告摘要  Abstract

Recent theoretical and experimental advancements have shown the importance of estimation and control theory to study quantum dynamics even thought this gives rise to unusual models that have not been completely explored yet. The new theoretical and experimental results can lead to the development of new quantum technologies, e.g. quantum computer, cryptography, and quantum memory. In quantum control, we can apply different strategies to design a feedback. Measurement-based feedback and coherent feedback are the most common strategies. In this talk, we consider a controlled quantum system whose finite dimensional state is governed by a discrete-time nonlinear Markov process. By assuming the quantum non-demolition (QND) measurements in open-loop, we construct a strict control Lyapunov function which is based on the open-loop stationary states. We propose a measurement- based feedback scheme which ensures the almost sure convergence towards a target state. Moreover, I discuss the estimation and filtering problem for continuous-time quantum systems which are described by continuous-time stochastic master equations.