Strong suppression of shot noise in a feedback-controlled single-electron transistor.
Strong suppression of shot noise in a feedback-controlled single-electron transistor.
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DOI：
10.1038/nnano.2016.225
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发表时间：
2016-02
影响因子：
38.3
通讯作者：
T. Wagner;P. Strasberg;J. Bayer;E. P. Rugeramigabo;T. Brandes;R. Haug
中科院分区：
文献类型：
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作者：
T. Wagner;P. Strasberg;J. Bayer;E. P. Rugeramigabo;T. Brandes;R. Haug
量子力学系统的反馈控制不仅因为量子测量的基本问题而迅速引起人们的关注，而且因为它在许多物理领域中的新应用而迅速引起人们的关注。量子控制在量子光学中得到了深入的研究，但最近在固态量子比特的控制方面也取得了进展。在量子传输中，虽然存在理论上的建议，但在单电子水平上只实现了少数主动的和被动的反馈实验。在这里，我们演示了如何抑制单电子晶体管中的散粒噪声，使用独有的电子闭环反馈来监控和调整计数统计，，，。随着反馈响应的增加，我们观察到对电荷电流波动的更强的抑制和更快的冻结。我们的技术类似于量子光学中使用的带环内光探测的压缩光的产生。亚泊松单电子源将为量子传输的高精度测量铺平道路，类似于光学或光学机械等效物。
Feedback control of quantum mechanical systems is rapidly attracting attention not only due to fundamental questions about quantum measurements, but also because of its novel applications in many fields in physics. Quantum control has been studied intensively in quantum optics,but progress has recently been made in the control of solid-state qubits,,as well. In quantum transport only a few active,,and passive,,feedback experiments have been realized on the level of single electrons, although theoretical proposals,,exist. Here we demonstrate the suppression of shot noise in a single-electron transistor using an exclusively electronic closed-loop feedback to monitor and adjust the counting statistics,,,,,,. With increasing feedback response we observe a stronger suppression and faster freezing of charge current fluctuations. Our technique is analogous to the generation of squeezed light with in-loop photodetection,,as used in quantum optics. Sub-Poisson single-electron sources will pave the way for high-precision measurements in quantum transport similar to optical or optomechanical equivalents.