论文标题
莫特绝缘子中高谐波产生的激子影响
Excitonic effects on high-harmonic generation in Mott insulators
论文作者
论文摘要
为了研究莫特绝缘子中对高谐波产生（HHG）的激子效应，我们研究了一维扩展的哈伯德模型中泵送的非平衡动力学。通过使用时间依赖性计算，基于精确的对角线化和无限的时间不断变化的块拆卸方法，我们发现了激子能量周围HHG强度的强大增强。亚MOTTAM差距方案中的亚周期分析表明，激子能量周围的时间分辨光谱的强度区域分为两个级别，并在驱动电场后振荡。这种激子动力学在质量上与自由doublon和Holon的动力学不同，但在Mott绝缘子中有助于HHG。
To study excitonic effects on high-harmonic generation (HHG) in Mott insulators, we investigate pumped nonequilibrium dynamics in the one-dimensional extended Hubbard model. By employing time-dependent calculations based on the exact diagonalization and infinite time-evolving block decimation methods, we find the strong enhancement of the HHG intensity around the exciton energy. The subcycle analysis in the sub-Mott-gap regime shows that the intensity region of the time-resolved spectrum around the exciton energy splits into two levels and oscillates following the driving electric field. This excitonic dynamics is qualitatively different from the dynamics of free doublon and holon but favorably contributes to HHG in the Mott insulator.
