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

一维量子自旋系统中周期性驱动控制自旋动力学和量子输运

• 批准号: 21740289
• 负责人: KUDO Kazue
• 金额: $ 2万
• 依托单位: Ochanomizu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740289/
• 关键词: 量子スピン系; 冷却原子系; 振動外場; スピンダイナミクス; スーパーブロッホ振動; 振動磁場

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.

我们从理论和数值上研究了时间周期外场驱动下的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的量子动力学的控制。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途径。我们已经证明，有效的群速度，这是从能量色散计算，很好地解释了在实验中观察到的波包动力学。