Tracking inner-hole-state dynamics of complex atoms via double-color x-ray laster beams*

Both coherent pumping and energy relaxation play important roles in understanding physical processes of ultra-intense coherent light-matter interactions. Here, using a large-scale quantum master equation approach [1], we describe dynamical processes of practical open quantum systems driven by both coherent and stochastic interactions. As examples, we investigate coherent dynamics of inner-shell electrons of a neon gas irradiated by a high intensity X-ray laser along with vast number of decaying channels. In these single-photon dominated processes, we find that, due to coherence-induced Rabi oscillations and power broadening effects, the photon absorptions of a neon gas can be suppressed resulting in differences in ionization processes and final ion-stage distributions. Second, we demonstrate a new scheme for the investigation of hole dynamics of complex atoms based on two-color ultrashort X-ray pulses.



REFERENCES

[1] Yongqiang Li, Cheng Gao, Wenpu Dong, Jiaolong Zeng, Zengxiu Zhao and Jianmin Yuan, Scientific Reports 5,18529 (2016).