A theoretical model based on the relaxation equation for the density matrix has been proposed to describe the ultrafast time dynamics of magnetically ordered systems with spin crossover in an excited state under a sudden perturbation. Oscillations of the magnetization, the population of the high-spin state, and the generation of local vibrons at a transition of the system from the light-excited Franck-Condon low-spin state to the highspin ground state.

中文翻译：

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突然扰动下具有自旋交叉的磁阶系统的超快量子弛豫动力学

提出了一种基于弛豫方程的密度矩阵理论模型，描述了在突然扰动下具有自旋交叉的磁阶系统的超快时间动力学。在系统从光激发的弗兰克-康登（Franck-Condon）低自旋态到高自旋基态的过渡过程中，磁化的振荡，高自旋态的填充以及局部振动子的产生。