Full counting statistics as a probe of quantum coherence in a side-coupled double quantum dot system
arXiv:1305.2051 · doi:10.1016/j.aop.2013.09.001
Abstract
We study theoretically the full counting statistics of electron transport through side-coupled double quantum dot (QD) based on an efficient particle-number-resolved master equation. It is demonstrated that the high-order cumulants of transport current are more sensitive to the quantum coherence than the average current, which can be used to probe the quantum coherence of the considered double QD system. Especially, the quantum coherence plays a crucial role in determining whether the super-Poissonian noise occurs in the weak inter-dot hopping coupling regime depending on the corresponding dot-lead coupling, and the corresponding values of super-Poissonian noise can be relatively enhanced when considering the spins of conduction electrons. Moreover, this super-Poissonian noise bias range depends on the singly-occupied eigenstates of the system, which thus suggests a tunable super-Poissonian noise device. The occurrence-mechanism of super-Poissonian noise can be understood in terms of the interplay of quantum coherence and effective competition between fast-and-slow transport channels.
15 pages, 5 figures, submitted to Annals of Physics
References in corpus (21)
- Single-shot read-out of an individual electron spin in a quantum dot
- Universal oscillations in counting statistics
- Counting Statistics of Non-Markovian Quantum Stochastic Processes
- Measurement of finite-frequency current statistics in a single-electron transistor
- Counting statistics of transport through Coulomb blockade nanostructures: High-order cumulants and non-Markovian effects
- Full counting statistics of nano-electromechanical systems
- Co-tunneling current and shot noise in quantum dots
- Noise enhancement due to quantum coherence in coupled quantum dots
- Factorial cumulants reveal interactions in counting statistics
- Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
- Counting statistics of coherent population trapping in quantum dots
- Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
- Shot noise in transport through "double quantum dots"
- Full counting statistics of transport through two-channel Coulomb blockade systems
- Interference effects in the counting statistics of electron transfers through a double quantum dot
- Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
- High-order cumulants in the counting statistics of asymmetric quantum dots
- Full counting statistics of chiral Luttinger liquids with impurities
- Effect of finite Coulomb interaction on full counting statistics of electronic transport through single-molecule magnet
- Effects of magnetic field and transverse anisotropy on full counting statistics in single-molecule magnet
- Can dephasing generate non-local spin correlations?