The dynamics of high Rydberg states in the presence of time-dependent inhomogeneous fields
The dynamics of high Rydberg states in the presence of time-dependent inhomogeneous fields
复制标题
存在随时间变化的非均匀场时高里德伯态的动力学
DOI：
10.1039/a909489j
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发表时间：
2000
影响因子：
3.4
通讯作者：
Softley
中科院分区：
文献类型：
--
作者：
Procter;Webb;Softley
本文对光学制备的里德堡波包在含时非均匀电场作用下的演化进行了计算，其结果与里德堡态的稳定性有关，适用于Zeke谱。该场被认为是由外加的磁场和微观电荷的存在(例如离子的伪随机分布)和其位置也可能随时间改变的外加电场的组合而产生的。计算的结果导致对实现里德堡稳定的条件有了更明确的定义，例如在现场切换实验中(Baranov等人，Chem.太棒了。Let.，1998,291,311)，并证实了在离子引起的微场存在的情况下，蓝移和红移Stark态之间的布居随机化发生的机制(Palm等，Philos.翻译过来的。R.Soc.伦敦，爵士。A，1997,355,1551)。在计算中发现离子的运动具有显著的m锁定效应，这为通常观察到的高n里德堡态布居衰变中的长寿命尾提供了一种可能的机制。
This paper presents calculations of the evolution of an optically prepared Rydberg wavepacket in the presence of time-dependent inhomogeneous electric fields and the results have relevance to the stabilization of Rydberg states as appropriate to ZEKE spectroscopy. The field is considered to arise from the combination of an applied field, which may be ramped in time, and the presence of microscopic charges, e.g., a pseudo-random distribution of ions, whose positions may also change with time. The results of the calculations lead to a clearer definition of the conditions under which Rydberg stabilization is achieved, such as in field switching experiments (Baranov et al., Chem. Phys. Lett., 1998, 291, 311), and also confirm the mechanisms by which the randomization of population between blue-shifted and red-shifted Stark states occurs in the presence of micro-fields due to ions (Palm et al., Philos. Trans. R. Soc. London, Ser. A, 1997, 355, 1551). The motion of the ions is found to have a significant m-locking effect in the calculations, providing a possible mechanism for the commonly observed long-lifetime tail in the population decay of high-n Rydberg states.