scholarly journals Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors

2015 ◽  
Vol 91 (23) ◽  
Author(s):  
Kristen Kaasbjerg ◽  
Wolfgang Belzig
Keyword(s):  
Quantum Dots ◽  
Single Molecule ◽  
Shot Noise ◽  
Full Counting Statistics ◽  
Counting Statistics

FLUCTUATIONS IN INELASTIC TUNNELING OF ELECTRONS THROUGH SERIALLY COUPLED DOUBLE QUANTUM DOTS

2008 ◽  
Vol 22 (27) ◽  
pp. 4899-4907
Author(s):  
QINGQIANG XU ◽  
SHI-JIE XIONG
Keyword(s):  
Quantum Dots ◽  
Transport Processes ◽  
Double Quantum ◽  
Multichannel Scattering ◽  
Many Body ◽  
Electron Phonon Interaction ◽  
Double Quantum Dots ◽  
Full Counting Statistics ◽  
Inelastic Transport ◽  
Counting Statistics

We investigate the inelastic transport properties of quantum dots connected to two leads, based on the combination of a recently developed nonperturbative technique and full counting statistics involving an approximate mapping of a many-body electron–phonon system onto a multichannel scattering system. The full counting statistics is adopted in the calculations of the inelastic transport processes of electrons where the electron–phonon interactions, which are the main source of the inelasticity, are taken into account. For serially coupled double quantum dots, we find that (i) both the current and the noise are suppressed when electron–phonon interaction switches on, and (ii) skewness becomes negative in a certain parameter regime, which is absent in the case without electron–phonon interactions.

scholarly journals Suppression of shot noise in a spin–orbit coupled quantum dot

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Zhimei Wang ◽  
Lijun Mao ◽  
Naitao Xue ◽  
Wenting Lu
Keyword(s):  
Quantum Dot ◽  
Shot Noise ◽  
Orbit Coupling ◽  
Quantum Master Equation ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Equation Approach ◽  
Full Counting Statistics ◽  
Master Equation Approach ◽  
Counting Statistics

We study theoretically the transport properties of electrons in a quantum dot system with spin–orbit coupling. By using the quantum master equation approach, the shot noise and skewness of the transport electrons are calculated. We obtain super-Poisson noise behaviour by investigating the full counting statistics of the transport system. We discover super-Poisson behaviour is more obvious with the spin polarization increasing. More importantly, we discover the suppression of shot noise induced by spin–orbit coupling. The value of shot noise is gradually decreasing when spin–orbit coupling strength increases.

Full counting statistics for electron number in quantum dots

2008 ◽  
Vol 5 (1) ◽  
pp. 154-157
Author(s):  
Yasuhiro Utsumi ◽  
Dmitri S. Golubev ◽  
Gerd Schön
Keyword(s):  
Quantum Dots ◽  
Electron Number ◽  
Full Counting Statistics ◽  
Counting Statistics
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