非线性三能级Λ-系统中原子-分子转换的绝热保真度
Adiabatic Fidelity for Atom-Molecule Conversion in a Nonlinear Three-Level Λ-system
摘要：
研究了原子-分子三能级$Λ$ -系统在受激拉曼绝热通道（STIRAP）下的布居转移动力学。我们发现，相干布居数囚禁态或暗态的绝热保真度随绝热参量的变化近似于单位的幂律。然而，幂指数远小于线性绝热定理的预测。我们进一步讨论了如何通过优化STIRAP的外参数来获得更高的暗态绝热保真度。这些讨论有助于在实际实验中获得更高的原子-分子转换产率。
英文摘要：
We investigate the dynamics of the population transfer for atom-molecule three-level $Λ$-system on stimulated Raman adiabatic passage(STIRAP). We find that the adiabatic fidelity for the coherent population trapping(CPT) state or dark state, as the function of the adiabatic parameter, approaches to unit in a power law. The power exponent however is much less than the prediction of linear adiabatic theorem. We further discuss how to achieve higher adiabatic fidelity for the dark state through optimizing the external parameters of STIRAP. Our discussions are helpful to gain higher atom-molecule conversion yield in practical experiments.
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