Current noise spectra and mechanisms with dissipaton equation of motion theory
Current noise spectra and mechanisms with dissipaton equation of motion theory
复制标题
DOI：
10.1063/1.4922712
复制
发表时间：
2015-06-21
影响因子：
4.4
通讯作者：
Yan, YiJing
中科院分区：
文献类型：
--
作者：
Jin, Jinshuang;Wang, Shikuan;Yan, YiJing
基于颜氏耗散运动方程(DEOM)理论[J].化学。物理。 140, 054105 (2014)]，我们研究了单杂质安德森模型的几种典型传输机制中电流噪声谱的特征。我们的 DEOM 计算可以正确恢复许多众所周知的特征，例如 Kondo 特征。更重要的是，研究表明，本征电子共隧道过程是造成反斯托克斯频率下电流噪声特征的原因。我们还确定了具有两个简并传输通道的非相互作用系统的噪声频谱中的完全破坏性干扰。 (C) 2015 AIP 出版有限责任公司。
Based on the Yan's dissipaton equation of motion (DEOM) theory [J. Chem. Phys. 140, 054105 (2014)], we investigate the characteristic features of current noise spectrum in several typical transport regimes of a single-impurity Anderson model. Many well-known features such as Kondo features are correctly recovered by our DEOM calculations. More importantly, it is revealed that the intrinsic electron cotunneling process is responsible for the characteristic signature of current noise at anti-Stokes frequency. We also identify completely destructive interference in the noise spectra of noninteracting systems with two degenerate transport channels. (C) 2015 AIP Publishing LLC.