The recombination processes of the electrons in solid are illustrated by solving the time-dependent Schrdinger equation. The results show that the Bohmian trajectories and the time evolution of the electronic probability density agrees very well, which demonstrates that we can use the Bohmian trajectories to investigate the recombination processes of the electrons in solid. We select the region where the probability density of the electron reached the strongest and the weakest as the initial position of the calculated Bohmian trajectories, one can see that the Bohmian trajectories have similar structures. In addition, our results show that the emission time of the solid high-order harmonic generation (HHG) spectra from the time-frequency distribution agrees well with the time that the Bohmian trajectories change direction. By regulating the phase of the electric field, the electrons can move farther, which will result in the broad cutoff of the HHG. We have also demonstrated that the similar structure of the Bohmian trajectories of the solid with a defect for different initial positions disappears due to the broken periodic structure, which further illustrates that the motion processes of the electrons in solid depend on the structure of the solid.

通过求解随时间变化的薛定inger方程，可以说明固体中电子的复合过程。结果表明，玻姆尼轨迹与电子概率密度的时间演化非常吻合，这表明我们可以利用玻姆尼轨迹研究固体中电子的复合过程。我们选择了电子的概率密度达到最强和最弱的区域作为计算出的Bohmian轨迹的初始位置，可以看到Bohmian轨迹具有相似的结构。此外，我们的结果表明，固体高阶谐波产生（HHG）光谱从时间-频率分布的发射时间与玻姆氏轨迹改变方向的时间非常吻合。通过调节电场的相位，电子可以移动的更远，这将导致HHG的广泛截止。我们还证明了，由于破坏了周期性结构，具有针对不同初始位置的缺陷的固体的Bohmian轨迹的相似结构消失了，这进一步说明了固体中电子的运动过程取决于固体的结构。