论文标题
由任何形状的周期性驱动引起的零偏置电流
Zero-bias current induced by periodic drive of any shape
论文作者
论文摘要
我们通过外部驱动器（脉冲）下的量子点研究时间依赖性电子电流，并在零偏置处耦合。通过任何形状的周期性脉冲生成的电流的简单分析表达式，无需任何使用浮雕膨胀。我们证明，电流遵循局部淬火，显示瞬态和稳态行为，这些行为由外部驱动器的相同通用函数描述。与非常高振幅的超快速脉冲相比，该结果用于对矩形和线性形式脉冲产生的电流的分析。我们的结果也适用于研究按需单电子源和激光驱动的连接。
We investigate time-dependent electron current through a quantum dot under external drive (pulses), coupled to leads at zero bias. Simple analytic expressions for current, generated by periodic pulses of any shape, are obtained without any use of the Floquet expansion. We demonstrate that the current, follows a local quench, displays the transient and steady-state behavior, which are described by the same universal function of an external drive. The results are applied for an analysis of the current generated by rectangular and linear form pulses, in comparison with ultra-fast pulses of very high amplitude. Our results are also applicable for study of On-Demand Single-Electron sources and laser driven junctions.
