论文标题
在定期驱动的电荷密度波绝缘子中形成间隙带形成
In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
论文作者
论文摘要
定期驱动的量子多体系统具有未在平衡时实现的非常规行为。在这里，我们调查了这种设置，用于在链上强烈相互作用的无旋转费，该链条在零温度和强相互作用下形成了电荷密度波波绝缘体。使用无偏的数值矩阵乘积方法来依赖时间依赖的光谱函数，我们发现相关的电荷密度波绝缘体的驱动不仅导致了有效的浮力汉密尔顿人预测的激发光谱的重新归一化，而且还导致了偶然的类似于余弦的内在特征。对于没有相互作用的电荷密度波模型，这是无法获得的。平均场治疗在双龙激发方面提供了部分解释。但是，全图需要考虑强大的相关效果。
Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. Here we investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator. Using unbiased numerical matrix product state methods for time-dependent spectral functions, we find that driving of the correlated charge-density wave insulator leads not only to a renormalization of the excitation spectrum as predicted by an effective Floquet Hamiltonian, but also to a cosine-like in-gap feature. This is not obtained for a charge density wave model without interactions. A mean-field treatment provides a partial explanation in terms of doublon excitations. However, the full picture needs to take into account strong correlation effects.
