手性分子对映体选择性量子态转移  

Enantioselective State Transfer of Chiral Molecules

作　　者：宋新娇 徐雷[1,2] SONG Xinjiao;XU Lei(School of Physics Science and Technology,Xinjiang University,Urumqi Xinjiang 830046,China;School of Physics and Electronic Information,Dezhou University,Dezhou Shandong 253023,China)

机构地区：[1]新疆大学物理科学与技术学院,新疆乌鲁木齐830046 [2]德州学院物理与电子信息学院,山东德州253023

出　　处：《德州学院学报》2024年第4期7-14,共8页Journal of Dezhou University

基　　金：德州学院博士基金项目:类石墨烯材料及其异质结的能带调控研究(2023xjrc207)。

摘　　要：基于手性分子最低的三个转动态,使用三束偏振方向相互垂直的微波场构建循环三能级系统,并通过两步激发实现手性分子对映体选择性量子态转移。利用Magnus展开系统幺正算符的方法,解析推导了为实现手性分子对映体选择性激发,微波场需要满足的振幅和相位条件。基于最优条件设计相干控制方案,并在真实的手性分子中进行数值模拟。研究结果表明,当控制场同时满足最优的振幅和相位条件时,手性分子可以实现完全的对映体选择性量子态转移,并且当脉冲存在一定误差时,关键激发阶段的脉冲误差对系统的影响更大。研究成果为实验上实现高保真的手性分子对映体选择性量子态转移提供了重要的理论依据,对研究后续的手性分离、合成和提纯具有重要的价值。In this paper,we use three microwave fields with mutually perpendicular polarization directions to construct a cyclic three-level system based on the lowest three transitions of chiral molecules,and realize enantioselective state transfer of chiral molecules through two-step excitation.Utilizing the method of Magnus expansion the system of the unitary operator,the amplitude and phase conditions that need to be met by the microwave field to achieve enantioselective excitation of chiral molecules are derived analytically.Based on the optimal conditions,the coherent control scheme is designed and numerically simulated in a real chiral molecule.The results show that chiral molecules can realize full enantioselective state transfer when the control field satisfies the optimal amplitude and phase conditions simultaneously,and the pulse error in the critical excitation phase has a greater impact on the system when there is some error in the pulse.Our results provide an important theoretical basis for the experimental realization of high-fidelity enantioselective quantum state transfer of chiral molecules,which is valuable for the study of subsequent chiral separation,synthesis and purification.

关 键 词：手性分子 对映选择性激发 微波脉冲 

分 类 号：O431.2[机械工程—光学工程]