Theoretical approach to zero-bias transport by quantum pumping and its applications

在这个项目中，我们利用我们发展的一种新的传输矩阵方法，从理论上阐明了由量子泵浦机制引起的零偏置电流的几个性质。特别是，我们发现，在一个相当简单的系统中，非绝热量子泵浦可以在不伴随任何电荷电流的情况下实现大范围的电荷电流或纯自旋电流。

In this project, we have clarified theoretically several properties of zero-bias currents induced by a quantum pumping mechanism by utilizing a novel transfer matrix approach developed by us. In particular, we found that non-adiabatic quantum pumping in a rather simple system can realizes large magnitudes of charge currents or pure spin currents without accompanying any charge currents.