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arXiv 1502.03170cond-mat.mes-hall
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量子点分子中的非马尔可夫全计数统计

Non-Markovian full counting statistics in quantum dot molecules

Hai-Bin Xue, Hu-Jun Jiao, Jiu-Qing Liang, Wu-Ming Liu

摘要:

电子输运的全计数统计是一种强有力的诊断工具,用于探测量子输运的性质,而不仅仅是从平均电流或电导测量获得的结果。特别是量子点分子的非马尔可夫动力学在非平衡电子隧穿过程中起着重要的作用。因此,有必要了解量子点分子中的非马尔可夫全计数统计。本文研究了两种典型的量子点分子,即具有高量子相干性的串联耦合和侧耦合双量子点在一定参数范围内的非马尔可夫全计数统计.我们证明了非马尔可夫效应通过量子点分子系统的量子相干性表现出来,并对高量子相干量子点分子系统的全计数统计产生显著影响,这取决于量子点分子系统与源、漏电极的耦合.结果表明,在高量子相干量子点分子体系中,考虑非马尔可夫效应对电子输运全计数统计的影响,可以更好地理解电子在量子点分子中的输运.

英文摘要:

Full counting statistics of electron transport is a powerful diagnostic tool for probing the nature of quantum transport beyond what is obtainable from the average current or conductance measurement alone. In particular, the non-Markovian dynamics of quantum dot molecule plays an important role in the nonequilibrium electron tunneling processes. It is thus necessary to understand the non-Markovian full counting statistics in a quantum dot molecule. Here we study the non-Markovian full counting statistics in two typical quantum dot molecules, namely, serially coupled and side-coupled double quantum dots with high quantum coherence in a certain parameter regime. We demonstrate that the non-Markovian effect manifests itself through the quantum coherence of the quantum dot molecule system, and has a significant impact on the full counting statistics in the high quantum-coherent quantum dot molecule system, which depends on the coupling of the quantum dot molecule system with the source and drain electrodes. The results indicated that the influence of the non-Markovian effect on the full counting statistics of electron transport, which should be considered in a high quantum-coherent quantum dot molecule system, can provide a better understanding of electron transport through quantum dot molecules.

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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