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Optimal and robust control of population transfer in asymmetric quantum-dot molecules

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【Author】 Yu Guo;Songshan Ma;Chuan-Cun Shu;Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering, School of Physics and Electronic Science,Changsha University of Science and Technology;Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University;

【通讯作者】马松山;束传存;

【机构】 Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering, School of Physics and Electronic Science,Changsha University of Science and Technology； Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University；

【摘要】 We present an optimal and robust quantum control method for efficient population transfer in asymmetric double quantum-dot molecules. We derive a long-duration control scheme that allows for highly efficient population transfer by accurately controlling the amplitude of a narrow-bandwidth pulse. To overcome fluctuations in control field parameters, we employ a frequency-domain quantum optimal control theory method to optimize the spectral phase of a single pulse with broad bandwidth while preserving the spectral amplitude. It is shown that this spectral-phase-only optimization approach can successfully identify robust and optimal control fields, leading to efficient population transfer to the target state while concurrently suppressing population transfer to undesired states. The method demonstrates resilience to fluctuations in control field parameters, making it a promising approach for reliable and efficient population transfer in practical applications.更多还原

【Abstract】 We present an optimal and robust quantum control method for efficient population transfer in asymmetric double quantum-dot molecules. We derive a long-duration control scheme that allows for highly efficient population transfer by accurately controlling the amplitude of a narrow-bandwidth pulse. To overcome fluctuations in control field parameters, we employ a frequency-domain quantum optimal control theory method to optimize the spectral phase of a single pulse with broad bandwidth while preserving the spectral amplitude. It is shown that this spectral-phase-only optimization approach can successfully identify robust and optimal control fields, leading to efficient population transfer to the target state while concurrently suppressing population transfer to undesired states. The method demonstrates resilience to fluctuations in control field parameters, making it a promising approach for reliable and efficient population transfer in practical applications.更多还原

【关键词】 population transfer； quantum optimal control theory； quantum-dot molecules；
【Key words】 population transfer； quantum optimal control theory； quantum-dot molecules；

【基金】 supported by the National Natural Science Foundations of China (Grant Nos. 12275033, 61973317, and 12274470);the Natural Science Foundation of Hunan Province for Distinguished Young Scholars (Grant No. 2022JJ10070);the Natural Science Foundation of Hunan Province (Grant No. 2022JJ30582);the Scientific Research Fund of Hunan Provincial Education Department (Grant No. 20A025)

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2024年02期

【分类号】O413

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