Optimal Control of Population Transfer in Three-Level Λ System with Genetic Algorithms
ZHANG Xiang-Yun1, SUN Zhen-Rong1, CHEN Guo-Liang1, WANG Zu-Geng1, Xü Zhi-Zhan2, LI Ru-Xin2
1Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics and Department of Mathematics, East China Normal University, Shanghai 200062
2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Optimal Control of Population Transfer in Three-Level Λ System with Genetic Algorithms
1Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics and Department of Mathematics, East China Normal University, Shanghai 200062
2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Abstract： Population transfer in a three-level Λ system is simulated numerically and optimized. Almost complete population transfer from |1> to |3> is achieved by a genetic algorithm while the population in state |2> reached minimum over the entire evolution at the same time. The result shows that the optimal pulse sequence is the well-known stimulated Raman adiabatic passage (STIRAP) scheme. The detuning of pump pulse and Stokes pulse Δp and Δs with the opposite sign and the chirps xp and xs with the same sign are in favour of the complete and robust population transfer for few-cycle laser pulse. Rabi frequencies Ωp and Ωs have insensitive effects on the complete population transfer during a large scope of their ratio when they are large enough.
ZHANG Xiang-Yun;SUN Zhen-Rong;CHEN Guo-Liang;WANG Zu-Geng;Xü Zhi-Zhan;LI Ru-Xin. Optimal Control of Population Transfer in Three-Level Λ System with Genetic Algorithms[J]. 中国物理快报, 2004, 21(10): 1930-1933.
ZHANG Xiang-Yun, SUN Zhen-Rong, CHEN Guo-Liang, WANG Zu-Geng, Xü Zhi-Zhan, LI Ru-Xin. Optimal Control of Population Transfer in Three-Level Λ System with Genetic Algorithms. Chin. Phys. Lett., 2004, 21(10): 1930-1933.
2004, Vol. 21 
