非线性囚禁离子模型中振幅平方压缩效应  

Amplitude-squared squeezing effects in nonlinear trapped ion model

作　　者：李聪[1] 王中结[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,芜湖241000

出　　处：《原子与分子物理学报》2013年第3期435-440,共6页Journal of Atomic and Molecular Physics

基　　金：安徽省自然科学基金(090412060)

摘　　要：本文从非线性Jaynes-Cummings模型出发,研究了受驻波场驱动的离子的质心运动振幅平方压缩效应.结果表明,非线性参数η对压缩效应有明显的影响.随着参数η的增大,离子处于压缩态的时间增长,压缩程度加深,但当η越过某一临界值时,离子最大压缩量减小,压缩时间相对变短;另外,驻波场的相位也对压缩效应有明显的影响.Based on the nonlinear Jaynes-Cummings model, the amplitude squared squeezing effect of the center-of- mass motion of the ion driven by a single of standing wave field was studied. The results show that the nonlinear parameter η has a great influence on the compression time, namely, when the parame- ter η increases, the duration time of squeezing grows and the squeezing degree is deeper; But when η rea ches a critical value, the maximum amount of squeezing decreases, the compression time becomes rela tively shorter. In addition, the phase of the standing wave field also shows a significant influence on the squeezing effect.

关 键 词：囚禁离子 非线性J—C模型 振幅平方压缩 Lamb-Dicke参数 

分 类 号：O431.2[机械工程—光学工程]