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Current noise spectra and mechanisms with dissipaton equation of motion theory
Jinshuang Jin1, Shikuan Wang2, Xiao Zheng3
1Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China.
Abstract:
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.
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