Low-dimensional detector model for full counting statistics: Trajectories, back action, and fidelity
Low-dimensional detector model for full counting statistics: Trajectories, back action, and fidelity
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用于完整计数统计的低维检测器模型：轨迹、反向动作和保真度
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Brandes
中科院分区：
文献类型：
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作者：
G. Schaller;G. Kiesslich;T. Brandes
研究了两个电容耦合输运通道的联合计数统计。特别是，我们研究必要的条件，利用一个通道作为检测器敏感的占领其他。当通过两个通道的隧穿速率相差很大时，即使探测器对探测通道的物理反作用很大，也可以在双通道机制中实现良好的探测器保真度。我们的方法允许估计误差的电荷计数检测器从时间分辨的电流测量-这已经在最近的实验中获得-单独。
We study the combined counting statistics of two capacitively coupled transport channels. In particular, we examine the conditions necessary for utilizing one channel as detector sensitive to the occupation of the other. A good detector fidelity may be achieved in a bistable regime when the tunneling rates through the two channels are vastly different -- even when the physical back-action of the detector on the probed channel is large. Our methods allow to estimate the error of charge counting detectors from time-resolved current measurements -- which have been obtained in recent experiments -- alone.