相干受激X射线喇曼光谱; RIXS的阿秒扩展
Coherent Stimulated X-ray Raman Spectroscopy; Attosecond Extension of RIXS
摘要：
利用Keldysh-Schwinger闭合时间路径环计算了自发和受激共振非弹性X射线喇曼散射信号，并将其表示为Doorway和Window电子空穴波包的重叠。这些是重铸的单粒子格林函数和膨胀系数的配置相互作用单打价激发，这可以从标准的电子结构代码。避免了对基态和芯激发体系的多体态的计算。
英文摘要：
Spontaneous and stimulated resonant inelastic X-ray Raman scattering signals are calculated using the Keldysh-Schwinger closed-time path loop and expressed as overlaps of Doorway and Window electron-hole wavepackets. These are recast in terms of the one-particle Green's functions and expansion coefficients of configuration interaction singles for valence excitations, which can be obtained from standard electronic structure codes. Calculation for many-body states of ground and core-excited system is avoided.
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