Fluctuation theorem for counting statistics in electron transport through quantum junctions
Fluctuation theorem for counting statistics in electron transport through quantum junctions
复制标题
用于统计通过量子结的电子传输的涨落定理
DOI：
10.1103/physrevb.75.155316
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发表时间：
2007
影响因子：
3.7
通讯作者：
S. Mukamel
中科院分区：
文献类型：
--
作者：
M. Esposito;U. Harbola;S. Mukamel
(日期：2008年2月6日)我们证明了在结中穿过量子系统的电子净数目的概率分布服从稳态fl作用定理(FT)，该定理可以通过穿过铅-系统界面的电子的全计数统计来检验。对于两个耦合量子点的模型，我们证明了FT对于长的入库时间是有效的，并提供了fi近时偏差的估计值。我们还证明了与传入或传出电子转移相关的Mandel(或Fano)参数显示出泊松(反聚束)统计。
(Dated: February 6, 2008)We demonstrate that the probability distribution of the net number of electrons passing througha quantum system in a junction obeys a steady-state fluctuation theorem (FT) which can be testedexperimentally by the full counting statistics (FCS) of electrons crossing the lead-system interface.The FCS is calculated using a many-body quantum master equation (QME) combined with a Li-ouville space generating function (GF) formalism. For a model of two coupled quantum dots, weshow that the FT becomes valid for long binning times and provide an estimate for the finite-timedeviations. We also demonstrate that the Mandel (or Fano) parameter associated with the incomingor outgoing electron transfers show subpoissonian (antibunching) statistics.