Shein-Lumbroso Ofir, Liu Junjie, Shastry Abhay, Segal Dvira, Tal Oren
Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 7610001, Israel.
Department of Chemistry and Centre for Quantum Information and Quantum Control, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.
Phys Rev Lett. 2022 Jun 10;128(23):237701. doi: 10.1103/PhysRevLett.128.237701.
We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information on quantum transport. This noise is experimentally identified in atomic and molecular junctions and theoretically analyzed by considering quantum interference due to fluctuating scatterers. Using conductance, shot-noise, and flicker-noise measurements, we show that the revealed quantum flicker noise uniquely depends on the distribution of transmission channels, a key characteristic of quantum conductors. This dependence opens the door for the application of flicker noise as a diagnostic probe for fundamental properties of quantum conductors and many-body quantum effects, a role that up to now has been performed by the experimentally less-accessible shot noise.
我们报道了纳米级导体中一种量子形式的电子闪烁噪声，它包含有关量子输运的宝贵信息。这种噪声在原子和分子结中通过实验得以识别，并通过考虑由波动散射体引起的量子干涉进行理论分析。通过电导、散粒噪声和闪烁噪声测量，我们表明所揭示的量子闪烁噪声独特地取决于传输通道的分布，这是量子导体的一个关键特征。这种依赖性为将闪烁噪声用作量子导体基本性质和多体量子效应的诊断探针打开了大门，而到目前为止，这一角色一直由实验上较难获取的散粒噪声来扮演。
