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arXiv 1102.2343cond-mat.mes-hall
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单电子发射的噪声和计数统计:理论

Noise and Counting Statistics of a Single Electron Emitter: Theory

Mathias Albert, Christian Flindt, Markus Büttiker

摘要:

本文综述了介观电容器这种相干单电子发射体的基本噪声特性的最新研究进展。该系统由一个通过量子点接触连接到二维电子气的亚微米腔组成。当受到周期性栅极电压调制时,介观电容器吸收并重新发射千兆赫兹频率的单电子,正如实验所证明的那样。此外,最近的高频噪声测量允许在不同的操作制度的设备的精确表征。在这里,我们讨论了一个简单的模型中的介观电容器的基本电荷转移过程,并显示该模型是如何能够完全再现测量的高频噪声谱。我们扩展我们的分析,在大量的期间,我们用来讨论作为一个单一的电子源的介观电容器的准确性的发射电子的计数统计。最后,我们考虑了介观电容器在未来实验中的可能应用,并确定了进一步理论研究的新途径。

英文摘要:

We review the latest progress in understanding the fundamental noise properties of a coherent single electron emitter known as the mesoscopic capacitor. The system consists of a sub-micron cavity connected to a two-dimensional electron gas via a quantum point contact. When subject to periodic gate voltage modulations, the mesoscopic capacitor absorbs and re-emits single electrons at giga-hertz frequencies as it has been demonstrated experimentally. Recent high-frequency noise measurements have moreover allowed for a precise characterization of the device in different operating regimes. Here we discuss a simple model of the basic charge transfer processes in the mesoscopic capacitor and show how the model is capable of fully reproducing the measured high-frequency noise spectrum. We extend our analysis to the counting statistics of emitted electrons during a large number of periods which we use to discuss the accuracy of the mesoscopic capacitor as a single electron source. Finally, we consider possible applications of the mesoscopic capacitor in future experiments and identify novel pathways for further theoretical research.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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