论文标题
隧道连接处电流波动的第三刻的基本和环境贡献
Fundamental and Environmental Contributions to the Cyclostationary Third Moment of Current Fluctuations in a Tunnel Junction
论文作者
论文摘要
隧道连接产生的当前波动已知非高斯。但是，当以高频和有限的带宽测量波动时，该特性会丢失。我们表明，隧道交界处在频率$ f $的隧道交界处产生的电场的四元素显示三阶相关性，即偏斜，当交界处以$ 3F $的电动驱动时，即使在短时间内，也揭示了障碍物传递的毒药统计量。除了交界处的这种内在贡献外，我们还观察到频率$ f $时的环境噪声引起的额外相关性以及来自频率$ f $的环境阻抗的反馈效果，而且在$ f $的某些倍数上也带来了反馈效果。
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 quadratures 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 time-scales. 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 effects coming from the environmental impedance not only at frequency $f$ but also at some multiples of $f$.
