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arXiv 2008.12652cond-mat.mes-hall
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周期驱动量子点中电子输运的全计数统计

Full counting statistics for electron transport in periodically driven quantum dots

Thomas D. Honeychurch, Daniel S. Kosov

摘要:

含时驱动影响系统的量子和热力学涨落,改变了电子噪声的熟悉物理图像,电子噪声是量子输运微观机制的重要信息来源。全计数统计(FCS)方法可以计算电流的全部累积量,是研究非平衡量子系统涨落的有力理论方法。在本文中,我们提出了应用FCS考虑周期性驱动结。结合Floquet理论的时间动力学和非平衡计数场格林函数,使实际制定的FCS的系统。计数场格林函数用于计算矩母函数,从而计算电子电流的时间平均累积量。该理论说明了使用不同的运输方案的模型系统。

英文摘要:

Time-dependent driving influences the quantum and thermodynamic fluctuations of a system, changing the familiar physical picture of electronic noise which is an important source of information the about microscopic mechanism of quantum transport. Giving access to all cumulants of the current, the full counting statistics (FCS) is the powerful theoretical method to study fluctuations in nonequilibrium quantum systems. In this paper, we propose the application of FCS to consider periodic driven junctions. The combination of Floquet theory for time dynamics and nonequilibrium counting-field Green's functions enables the practical formulation of FCS for the system. The counting-field Green's functions are used to compute the moment generating function, allowing for the calculation of the time-averaged cumulants of the electronic current. The theory is illustrated using different transport scenarios in model systems.

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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