多端含时散射体的Keldysh action
The Keldysh action of a multi-terminal time-dependent scatterer
摘要：
我们提出了一个推导的Keldysh行动的一般多通道的含时散射体的Landauer-Büttiker方法的上下文中。作用量是量子输运理论中的一个方便的组成部分。这个行动是采取紧凑的形式，只涉及散射矩阵和水库格林函数。我们推导出两种特殊情况下的一般结果，一个有效的储层的特点是由定义良好的填充因子，另一个时，散射连接两个水库。我们说明它的使用考虑全计数统计和费米边缘奇异性。
英文摘要：
We present a derivation of the Keldysh action of a general multi-channel time-dependent scatterer in the context of the Landauer-Büttiker approach. The action is a convenient building block in the theory of quantum transport. This action is shown to take a compact form that only involves the scattering matrix and reservoir Green functions. We derive two special cases of the general result, one valid when reservoirs are characterized by well-defined filling factors, the other when the scatterer connects two reservoirs. We illustrate its use by considering Full Counting Statistics and the Fermi Edge Singularity.
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