Time Ordering and Counting Statistics

被引：13
|
作者：
Bachmann, S. [1 ]
Graf, G. M. [1 ]
Lesovik, G. B. [1 ,2 ]
机构：
[1] ETH, CH-8093 Zurich, Switzerland
[2] RAS, LD Landau Theoret Phys Inst, Moscow 117940, Russia
来源：
JOURNAL OF STATISTICAL PHYSICS | 2010年 / 138卷 / 1-3期
基金：
俄罗斯基础研究基金会;
关键词：
Time ordering; Correlation functions; Counting statistics; Contact terms; Schwinger terms; Transport theory; SHOT-NOISE; CHARGE-TRANSPORT; QUANTUM; CONDUCTORS; QUANTIZATION;
D O I：
10.1007/s10955-009-9885-z
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The basic quantum mechanical relation between fluctuations of transported charge and current correlators is discussed. It is found that, as a rule, the correlators are to be time-ordered in an unusual way. Instances where the difference with the conventional ordering matters are illustrated by means of a simple scattering model. We apply the results to resolve a discrepancy concerning the third cumulant of charge transport across a tunnel junction.
引用
收藏
页码：333 / 350
页数：18
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