激光脉冲作用下囚禁离子的规则与混沌运动  

Regular and chaotic motions of a single trapped ion interacting with standing laser pulses

作　　者：李飞 海文华[1] 

机构地区：[1]湖南师范大学物理系,长沙410081

出　　处：《物理学报》2004年第5期1309-1315,共7页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :10 2 75 0 2 3 );波谱与原子分子物理国家重点实验室 (批准号 :T15 2 10 3 )资助的课题~~

摘　　要：研究驻波型激光脉冲作用下 ,失谐量足够大时 ,囚禁于Paul阱中的单离子系统的久期运动 .通过分析和数值计算相结合的方法 ,导出系统的精确解及其描述的时间演化性质 ,得到系统的规则和混沌运动轨道以及阱频很小时系统进入整体混沌的临界条件 ,并提出了控制系统共振失稳的方法 .We have studied the secular motion of a single ion stored in a Paul trap and subjected to a sequence of standing laser pulses. Through theoretical analyses and numerical calculations, we obtain an exact solution of the classical motion equation that describes time evolution of the system. By using the exact solution we have investigated regular and chaotic motions of the system. For a weakly trapped ion with small confining frequency, a critical condition under which the system goes into global chaos is found. The loss of stability caused by resonance is shown and a method for controlling the instability is established.

关 键 词：激光脉冲 囚禁离子 混沌运动 规则运动 精确解 稳定性分析 PAUL阱 量子计算 量子信息 

分 类 号：O439[机械工程—光学工程]