Fluctuation theorems for capacitively coupled electronic currents
Fluctuation theorems for capacitively coupled electronic currents
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电容耦合电子电流的涨落定理
DOI：
10.1103/physrevb.84.165114
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发表时间：
2011
影响因子：
3.7
通讯作者：
P. Gaspard
中科院分区：
文献类型：
--
作者：
Gregory Bulnes Cuetara;M. Esposito;P. Gaspard
本文从理论上研究了两个电容耦合平行输运通道系统中电子输运的计数统计。每个通道由通过隧道连接到两个水库的量子点组成。系统的非平衡稳态由两个亲和力或热力学力控制，每个亲和力或热力学力由每个通道的两个储库决定。单电流涨落定理的地位进行了研究，从基本的两个电流涨落定理，这是一个后果的微观可逆性。我们表明，单电流波动定理持有的限制，两个平行的量子点之间的大库仑排斥，以及在限制的大电流比之间的平行通道。在后者的限制，单电流波动定理的对称关系是满意的有效亲和力，这是远远低于由水库确定的亲和力。这种反作用效应的特点是定量的。© 2011美国物理学会。
The counting statistics of electron transport is studied theoretically in a system with two capacitively coupled parallel transport channels. Each channel is composed of a quantum dot connected by tunneling to two reservoirs. The nonequilibrium steady state of the system is controlled by two affinities or thermodynamic forces, each one determined by the two reservoirs of each channel. The status of a single-current fluctuation theorem is investigated starting from the fundamental two-current fluctuation theorem, which is a consequence of microreversibility. We show that the single-current fluctuation theorem holds in the limit of a large Coulomb repulsion between the two parallel quantum dots, as well as in the limit of a large current ratio between the parallel channels. In this latter limit, the symmetry relation of the single-current fluctuation theorem is satisfied with respect to an effective affinity that is much lower than the affinity determined by the reservoirs. This backaction effect is characterized quantitatively. © 2011 American Physical Society.