X射线脉冲序列引发的超快耗散自旋态动力学
Ultrafast dissipative spin-state dynamics triggered by X-ray pulse trains
摘要：
阿秒科学的前沿不断变化，从而解决越来越复杂的影响与越来越高的分辨率。超短脉冲提供了一种实用的方法来制备复杂的量子态叠加，跟踪和控制它们的动力学。本文利用基于密度矩阵的含时受限空间组态相互作用理论，研究了过渡金属配合物2 p核-激发态之间的强自旋轨道耦合和亚飞秒激发触发的超快自旋翻转过程.利用电子系统加振动浴分区的核振动的效果被纳入。讨论了孤立亚飞秒脉冲与脉冲串的区别以及各种脉冲特性对起爆动力学的影响。所研究的效应可以潜在地用于亚几fs实验中的超快时钟。
英文摘要：
Frontiers of attosecond science are constantly shifting, thus addressing more and more intricate effects with increasing resolution. Ultrashort pulses offer a practical way to prepare complex superpositions of quantum states, follow, and steer their dynamics. In this contribution, an ultrafast spin-flip process triggered by sub-femtosecond (fs) excitation and strong spin-orbit coupling between 2p core-excited states of a transition metal complex is investigated using density matrix-based time-dependent restricted active space configuration interaction theory. The effect of the nuclear vibrations is incorporated making use of an electronic system plus vibrational bath partitioning. The differences between isolated sub-fs pulses and pulse trains as well as influence of various pulse characteristics on the initiated dynamics are discussed. The effect under study can be potentially used for ultrafast clocking in sub-few fs experiments.
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