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非线性朗道-齐纳隧穿的高频周期调制效应

Effect of high-frequency periodic modulation on the nonlinear Landau-Zener tunneling
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摘要 研究了高频周期调制场对非线性两能级系统朗道-齐纳隧穿(Landau-Zener tunneling简称LZT)的影响.通过对系统的能级差进行高频周期调制,运用解析法和数值法同时发现,加高频周期调制场等价于两能级间耦合系数v减小为有效耦合系数qv(q为修正系数)而不加调制场,并得到了修正系数q的表达式. The effect of high-frequency periodic modulation on the Landau-Zener tunneling of a nonlinear two-level system is investigated.By applying a high-frequency periodic modulation on the energy bias of the system and employing the analytical method and numerical method,it is found that the effect of high-frequency periodic modulation is equivalent to no modulation with the coupling constant v between the two levels decreasing to the effective coupling the effect of constant qv(q is the correction factor).And the analytic expression of the correction factor q is obtained.
出处 《西北师范大学学报(自然科学版)》 CAS 2008年第3期27-30,共4页 Journal of Northwest Normal University(Natural Science)
基金 国家自然科学基金资助项目(10575082) 甘肃省自然科学基金资助项目(3ZS061-A25-013) 西北师范大学科技创新工程资助项目(NWNU-KJCXGC-03-17)
关键词 非线性两能级系统 朗道-齐纳隧穿(LZT)模型 高频周期调制 有效耦合系数 nonlinear two-level system Landau-Zener tunneling model high-frequency periodic modulation effective coupling constant
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参考文献15

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