Numerical Study of Spectroscopic Properties in Low-Dimensional Strongly Correlated Electron Systems

我们主要研究低维强关联电子系统的光谱性质，这些系统可以探测到自旋、电荷、轨道和晶格自由度的动力学行为，从而使我们对系统中出现的各种量子现象的理解取得进展。我们使用的数值技术，如精确对角化和动力学密度矩阵重整化群。我们发现了这些体系的各种光谱性质，如光激发、Mott绝缘体与声子耦合的弛豫动力学、低维自旋体系与声子耦合的自旋动力学、巡游反铁磁体和铜氧化物超导体中的共振非弹性X射线散射、三角晶格有机体系中的磁拉曼散射等。所得结果发表在许多期刊上。

We focus on spectroscopic properties of low-dimensional strongly correlated electron systems, which can detect dynamics of spin, charge, orbital, and lattice degrees of freedom, in order to make a progress on our understanding of various quantum phenomena appearing in the systems. We use numerical techniques such as exact diagonalization and dynamical density-matrix renormalization group. We find various spectroscopic properties in the systems, for example, photoexcitation the relaxation dynamics of Mott insulators coupled to phonon, spin dynamics in low-dimensional spin systems coupled to phonon, resonant inelastic x-ray scattering in itinerant antiferromagnets and cuprate superconductors, magnetic Raman scattering in organic systems with triangular lattice. The obtained results are published in many journals.