论文标题
电子班车作为自主单电子源
Electron shuttle as an autonomous single-electron source
论文作者
论文摘要
单电子源的大多数实验实现都取决于隧道连接的周期性操纵，因此需要对系统的高度控制。为了规避外部驾驶的必要性，我们利用了电子班车的自振荡行为。通过以前没有应用于此自主系统的等待时间分布，我们广泛评估了航天飞机作为单电子源的性能。我们在三个方案之间揭示了平稳的过渡，而先前在相同平均场所描述水平的研究仅根据时间平均电子电流来预测急剧分叉。在已经存在的实验实现的参数范围内，电子班车可以作为单电子源执行，尽管具有适度的精度。我们提出了依赖位置的隧道速率的替代设计，该设计大大降低了电荷传输的相对误差，从而为实现自主单电子源的实现铺平了道路。
The majority of experimental realizations of single-electron sources rely on the periodic manipulation of the tunnel junctions through their gate voltages, and thus require a high level of control over the system. To circumvent the necessity of external driving, we utilize the self-oscillatory behavior of the electron shuttle. By means of waiting time distributions, which had not been applied to this autonomous system before, we extensively assess the performance of the shuttle as a single-electron source. We unveil a smooth transition between three regimes, whereas previous studies at the same mean field level of description only predict a sharp bifurcation based on the time-averaged electron current. Over the parameter range of already existing experimental realizations the electron shuttle can perform as a single-electron source, albeit with moderate precision. We propose an alternative design of the position-dependent tunneling rates, which significantly decreases the relative error of charge transmission, and thus paves the way for the realization of autonomous single-electron sources.
