Fundamental and environmental contributions to the cyclostationary third moment of current fluctuations in a tunnel junction

被引：1

作者：

Fevrier, Pierre ^{[1
,2
]}

Lupien, Christian ^{[1
,2
]}

Reulet, Bertrand ^{[1
,2
]}

机构：

[1] Univ Sherbrooke, Inst Quant, Sherbrooke, PQ J1K 2R1, Canada

[2] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 24期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

SHOT-NOISE;

D O I：

10.1103/PhysRevB.101.245440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Current fluctuations generated by tunnel junctions are known to be non-Gaussian. However, this property is lost when fluctuations are measured at high frequency and limited bandwidth. We show that the fluctuations of the electric field generated by a tunnel junction at frequency f displays third order correlations, i.e., skewness, when the junction is electrically driven at 3f, revealing the Poisonnian statistic of charge transfer by the barrier even at short timescales. In addition to this intrinsic contribution from the junction, we observe extra correlations induced by the environmental noise at frequency f as well as a feedback effect coming from the environmental impedance not only at frequency f but also at some multiples of f.

引用

页数：6