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arXiv 1006.0630cond-mat.mes-hallmath-phmath.MP
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非对称量子点计数统计中的高阶累积量

High-order cumulants in the counting statistics of asymmetric quantum dots

Christian Fricke, Frank Hohls, Nandhavel Sethubalasubramanian, Lukas Fricke, Rolf J. Haug

摘要:

利用量子点接触作为电荷探测器,对单电子隧穿量子点的过程进行了长时间的测量。这个大的统计基础是用于详细检查的计数统计变化对称性的量子点系统。从测量的统计量,我们提取高阶累积量描述的分布。高阶累积量的振荡时,观察到的对称性的变化。我们比较这种行为的时间依赖性观察到的振荡,并表明,这两个系统变量的变化导致相同的振荡响应。

英文摘要:

Measurements of single electron tunneling through a quantum dot using a quantum point contact as charge detector have been performed for very long time traces with very large event counts. This large statistical basis is used for a detailed examination of the counting statistics for varying symmetry of the quantum dot system. From the measured statistics we extract high order cumulants describing the distribution. Oscillations of the high order cumulants are observed when varying the symmetry. We compare this behavior to the observed oscillation in time dependence and show that the variation of both system variables lead to the same kind of oscillating response.

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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