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arXiv 1012.0750cond-mat.mes-hall
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阶乘累积量揭示了计数统计中的相互作用

Factorial cumulants reveal interactions in counting statistics

Dania Kambly, Christian Flindt, Markus Büttiker

摘要:

全计数统计关注电子在介观结构中的随机输运。最近的研究表明,两端系统中非相互作用电子的电荷输运统计总是广义二项式的:它可以分解为独立的单粒子事件,生成函数的零点是实的和负的。在这里,我们调查如何的生成函数的零点移动到复杂的平面,由于相互作用,并证明了零的位置可以使用高阶阶乘累积量检测。作为一个说明性的例子,我们考虑电子输运通过库仑阻塞量子点,我们表明,在量子点上的相互作用是清晰可见的高阶阶乘累积。我们的研究结果是很重要的相互作用的影响,了解计数统计和生成函数的零方面的特性为我们提供了一个简单的解释最近的实验,高阶统计量已被测量。

英文摘要:

Full counting statistics concerns the stochastic transport of electrons in mesoscopic structures. Recently it has been shown that the charge transport statistics for non-interacting electrons in a two-terminal system is always generalized binomial: it can be decomposed into independent single-particle events and the zeros of the generating function are real and negative. Here we investigate how the zeros of the generating function move into the complex plane due to interactions and demonstrate that the positions of the zeros can be detected using high-order factorial cumulants. As an illustrative example we consider electron transport through a Coulomb blockade quantum dot for which we show that the interactions on the quantum dot are clearly visible in the high-order factorial cumulants. Our findings are important for understanding the influence of interactions on counting statistics and the characterization in terms of zeros of the generating function provides us with a simple interpretation of recent experiments, where high-order statistics have been measured.

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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