Control of spin dynamics and quantum transport by periodic driving in one-dimensional quantum spin systems

本文从数值和理论上研究了时间周期外场驱动下一维量子系统的量子动力学。我们的重点是在时间周期场驱动的空间周期系统中量子动力学的控制。我们基于量子-经典对应的理论分析为理解量子输运现象提供了一种直观的方法。我们已经证明，由能量色散计算的有效群速度很好地解释了实验中观察到的波包动力学。

We have investigated numerically and theoretically the quantum dynamics in one-dimensional quantum systems driven by time-periodic external fields. Our focus is on the control of quantum dynamics in a spatially periodic system driven by a time-periodic field. Out theoretical analysis based on quantum-classical correspondence provides an intuitive way to understand the quantum transport phenomenon. We have demonstrated that the effective group velocity, which is calculated from energy dispersion, well explains the wave-packet dynamics that was observed in experiments.