Counting Statistics for Electron Capture in a Dynamic Quantum Dot
Counting Statistics for Electron Capture in a Dynamic Quantum Dot
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DOI：
10.1103/physrevlett.110.126803
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发表时间：
2013-03-20
影响因子：
8.6
通讯作者：
Schumacher, Hans W.
中科院分区：
文献类型：
--
作者：
Fricke, Lukas;Wulf, Michael;Schumacher, Hans W.
我们报告了非侵入性的单电荷检测的全概率分布P-n的初始化的量子点与n个电子的快速去耦从电子库。我们分析了数据的上下文中的顺序隧道夹断模型，它具有对应于两个相反的机制的通用解决方案。一个极限考虑连续的“冻结出”的一个渐近演化的巨正则分布，另一个是一个无热极限相当于一个广义的衰变级联模型的解决方案。我们确定在我们的样品中的非热捕获机制，证明了我们的理论和实验相结合的方法的高精度。捕获机制之间的区别使我们能够获得有效的实验策略，以改善初始化。DOI：10.1103/PhysRevLett.110.126803
We report noninvasive single-charge detection of the full probability distribution P-n of the initialization of a quantum dot with n electrons for rapid decoupling from an electron reservoir. We analyze the data in the context of a model for sequential tunneling pinch-off, which has generic solutions corresponding to two opposing mechanisms. One limit considers sequential "freeze-out'' of an adiabatically evolving grand canonical distribution, the other one is an athermal limit equivalent to the solution of a generalized decay cascade model. We identify the athermal capturing mechanism in our sample, testifying to the high precision of our combined theoretical and experimental methods. The distinction between the capturing mechanisms allows us to derive efficient experimental strategies for improving the initialization. DOI: 10.1103/PhysRevLett.110.126803