原子双阱势中电子波包的非绝热操控  

Non-adiabatic control of electron wave-packet in atomic double-well potential

作　　者：谭勇刚[1] 杨海峰 TAN Yong-Gang;YANG Hai-Feng(College of Physics and Electronic Information,Luoyang Normal University,Luoyang 471934,China)

机构地区：[1]洛阳师范学院物理与电子信息学院,洛阳471934

出　　处：《原子与分子物理学报》2020年第5期657-662,共6页Journal of Atomic and Molecular Physics

基　　金：河南省高等学校青年骨干教师培养计划(2017GGJS137)。

摘　　要：交叉电场和磁场中的氢原子具有双阱势能结构.本文基于量子力学模拟,采用半周期脉冲(HCP)序列开展电子波包的非绝热操控.详细研究了HCP的电场幅度、数量和时间间隔对电子波包的空间和能量分布的影响,实现了将初始电子波包非绝热转移到远离库伦中心的外势阱中的低能态,这些低能态较为稳定且显示出很大的电偶极矩.相比光激发和绝热操控,本文的方法更为快速、高效,可以应用于更为复杂的外场或分子体系.The potential energy of hydrogen atom in the crossed electric and magnetic fields presents a double-well structure. Based on quantum mechanical simulation, this paper uses a half-cycle pulse(HCP) sequence to perform non-adiabatic manipulation of electronic wave packets. The effects of the amplitude, number and time interval of HCP on the space and energy distribution of the electron wave packet are studied in detail, and the electron wave packet is non-adiabatically transferred to the low energy state of the external potential well away from the Coulomb center. These low energy states are stable and display large electric dipole moment. Compared to photoexcitation and adiabatic manipulation, the method in this paper is faster and more efficient and can be applied to more complex external fields or molecular systems.

关 键 词：里德堡原子 双势阱 半周期脉冲 

分 类 号：O562[理学—原子与分子物理]