Current noise spectra and mechanisms with dissipaton equation of motion theory

Journal Article · Sun Jun 21 00:00:00 EDT 2015 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4922712· OSTI ID:22490812

Jin, Jinshuang ^[1]; Wang, Shikuan ^[2]; Zheng, Xiao ^[3]; Yan, YiJing ^[4]

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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)

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.

• OSTI ID: 22490812
• Journal Information: Journal of Chemical Physics, Vol. 142, Issue 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
97 MATHEMATICAL METHODS AND COMPUTING
ELECTRONS
EQUATIONS OF MOTION
NOISE
SPECTRA