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arXiv 1105.3134cond-mat.mes-hallcond-mat.stat-mech
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双量子点与点接触静电计耦合的涨落定理

Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer

D. S. Golubev, Y. Utsumi, M. Marthaler, Gerd Schoen

摘要:

利用电容耦合量子点接触静电计研究了单电子通过双量子点的输运过程。我们导出了耦合DQD-QPC系统的全计数统计,得到了符合涨落定理(FT)的电荷通过DQD和QPC转移的联合概率分布。系统可以用主方程描述,隧穿率依赖于计数场,满足广义局部详细平衡关系。此外,我们还推导出了电流非线性修正与噪声之间的普遍关系,并在实验中得到了验证。

英文摘要:

We study single-electron transport through a double quantum dot (DQD) monitored by a capacitively coupled quantum point-contact (QPC) electrometer. We derive the full counting statistics for the coupled DQD - QPC system and obtain the joint probability distribution of the charges transferred through the DQD and the QPC consistent with the fluctuation theorem (FT). The system can be described by a master equation with tunneling rates depending of the counting fields and satisfying a generalized local detailed-balance relation. Furthermore, we derive universal relations between the non-linear corrections to the current and noise, which can be verified in experiment.

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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