论文标题
电场中一维Hubbard模型的振荡电荷电流
Oscillating charge currents of one-dimensional Hubbard model in an electric field
论文作者
论文摘要
已经以严格的方式研究了电场中一维Hubbard模型的电荷电流的时间演变特性。我们发现，有一个完整且正统的时间进化状态集，电荷电流只能保持零或振荡，与由于强相关性而导致的阻尼或过度阻尼Bloch振荡的可能图片不同。还发现，与这些状态相关联，存在一组恒定的相位因素，这些因素是唯一确定的，并且在讨论系统的长期演化行为方面非常有用。
The time evolution properties of charge current for the one-dimensional Hubbard model in an electric field have been studied in a rigorous manner. We find that there is a complete and orthonormal set of time-evolution states for which the charge current can only keep zero or oscillate constantly, differing from the possible picture of damped or over-damped Bloch oscillations due to strong correlations. It is also found that, associated with these states, there is a set of constant phase factors, which are uniquely determined and are very useful on discussing the long-time evolution behaviors of the system.
