周期耦合量子阱中的输运问题

采用Gurvitz等人直接求解薛定谔方程的方法并结合数值计算，分析了驱动频率对周期耦合量子阱体系的电流的影响.结果表明：当驱动频率小于耦合量子阱间的能级差时，随着驱动频率的增大，系统平衡时的电流增加，当驱动频率大于耦合量子阱间能级差时，随着驱动频率的增大，平衡时的电流减小.这样，通过控制外场驱动频率来达到控制电流的目的. 关键词： 量子阱 驱动频率 电流

A periodic coupled quantum well transport

Using the method developed by Gurvitz S.A for solving Shrodinger equations and numerical calculation, we investigate the driving frequency dependence of the current of periodic coupled quantum wells.The results indicate that the stable current increases with the driving frequency on condition of the driving frequency being smaller than the energy difference between wells. Otherwise, the stable current will decrease with increasing driving frequency. Therefore,the current of the system can be controlled by the driving frequency.