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State Transfer of Two-level Quantum System Feedback Control Based on Online State Estimation
Shuang Cong (University of Science and Technology of China), Yaru Tang (University of Science and Technology of China), Kezhi Li (University College London)
Abstract: A quantum state feedback control method is proposed in this paper. The state of a two-level open quantum system is estimated online based on the continuous weak measurement and the compressed sensing theory. Based on the state estimated online and the Lyapunov stability theorem, the state feedback control law used to transfer the quantum state is designed. Moreover, three numerical simulation experiments are implemented in the MATLAB environment: the state transfer from eigenstates to eigenstates, superposition states to superposition states, and superposition states to mixed states. The experimental results verify high performance of the proposed feedback control based on the state estimated online.