绝热条件下二能级系统相干控制动态分析  

Dynamic analysis of the two-level system quantum coherent control under adiabatic condition

作　　者：郑淮斌[1] 仇旭[1] 李永放[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2007年第4期28-32,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2003A08)

摘　　要：在量子力学的缀饰态表象中,运用布洛赫矢量及其球形图,研究了正弦相位调制的整形脉冲作用到二能级系统的跃迁过程,对其随时间演化过程进行形象化动态分析.结果表明,合适的正弦函数位相整形脉冲作用到二能级系统,无论整形脉冲选择何种位相,都可使粒子布居数反转,并使粒子维持在该态上.在绝热条件下,光场与系统作用过程中粒子的绝热状态随态和位相走势的不同而变化.In the dressed state picture, the transition process and the time evolution dynamic process of a two-level system excited by the sinusoidal phase-modulated shaping pulse are investigated with the Bloch vector sphere schematic diagram. The results show that when a two-level system is interacted with the proper sinusoidal phase shaping pulse, the population is inversed and remained in same state and is irrelevant of the! shaping pulse. During the interaction between field and system, the adiabatic states of particles are variant with the different circumstances of light field phase under the adiabatic condition.

关 键 词：脉冲整形 绝热条件 绝热跟随 布洛赫矢量 

分 类 号：O437.3[机械工程—光学工程]