Current noise spectra and mechanisms with dissipaton equation of motion theory

Jinshuang Jin; Shikuan Wang; Xiao Zheng; YiJing Yan

doi:10.1063/1.4922712

Current noise spectra and mechanisms with dissipaton equation of motion theory

J Chem Phys. 2015 Jun 21;142(23):234108. doi: 10.1063/1.4922712.

Authors

Jinshuang Jin¹, Shikuan Wang², Xiao Zheng³, YiJing Yan⁴

Affiliations

¹ Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China.
² Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China.
³ Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
⁴ Hefei National Laboratory for Physical Sciences at the Microscale and iChEM, University of Science and Technology of China, Hefei, Anhui 230026, China.

PMID: 26093551
DOI: 10.1063/1.4922712

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.