Counting statistics of cotunneling electrons

被引：28
|
作者：
Emary, Clive [1 ]
机构：
[1] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 23期
关键词：
Coulomb blockade; Liouville equation; master equation; noise; perturbation theory; quantum dots; tunnelling; ZERO-BIAS ANOMALIES; QUANTUM TRANSPORT; RATE-EQUATIONS; SHOT-NOISE; DOTS; CONDUCTORS; BLOCKADE; BARRIER; CHARGE; STATES;
D O I：
10.1103/PhysRevB.80.235306
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We describe a method for calculating the counting statistics of electronic transport through nanoscale devices with both sequential and cotunneling contributions. The method is based upon a perturbative expansion of the von Neumann equation in Liouvillian space, with current cumulants calculated from the resulting non-Markovian master equation without further approximation. As application, we consider transport through a single quantum dot and discuss the effects of cotunneling on noise and skewness, as well as the properties of various approximation schemes.
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页数：12
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