Multi-objective optimization in quantum parameter estimation

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 30-35
• 页数: 6页
• 语种: 英文

摘要

We investigate quantum parameter estimation based on linear and Kerr-type nonlinear controls in an open quantum system,and consider the dissipation rate as an unknown parameter.We show that while the precision of parameter estimation is improved,it usually introduces a significant deformation to the system state.Moreover,we propose a multi-objective model to optimize the two conflicting objectives:(1) maximizing the Fisher information,improving the parameter estimation precision,and (2) minimizing the deformation of the system state,which maintains its fidelity.Finally,simulations of a simplified e-constrained model demonstrate the feasibility of the Hamiltonian control in improving the precision of the quantum parameter estimation.