超快原子间电子衰变过程的实时时空跟踪
Tracing ultrafast interatomic electronic decay processes in real time and space
摘要：
激光泵浦探测技术的巨大进步为实时观测超快\textit{electronic}过程打开了大门。特别吸引人的是原子间过程的可视化，人们可以跟踪能量从一个原子转移到另一个原子的过程。原子间库仑衰变（ICD）提供了这样一个过程，在自然界中是丰富的。一个多电子波包传播方法，使现在能够跟踪完全从头计算的过程中的电子动力学的实时和空间考虑到所有的电子系统和它们的相关性。计算和分析了稀有气体团簇NeAr中Ne2s电离后电子云在整个ICD过程中的演化。该过程发生在飞秒时间尺度上，并且在更短的阿秒时间尺度上发现了令人惊讶的强烈响应。
英文摘要：
Tremendous advances in laser pump-probe techniques open the door for the observation in real time of ultrafast \textit{electronic} processes. Particularly attractive is the visualization of interatomic processes where one can follow the process of energy transfer from one atom to another. The interatomic Coulombic decay (ICD) provides such a process which is abundant in nature. A multielectron wavepacket propagation method enables now to trace fully ab initio the electron dynamics of the process in real time and in space taking into account all electrons of the system and their correlations. The evolution of the electronic cloud throughout the ICD process in the rare gas cluster NeAr following Ne2s ionization is computed and analyzed. The process takes place on a femtosecond timescale, and a surprisingly strong response is found at a much shorter attosecond timescale.
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