Coherent Transport through an interacting double quantum dot: Beyond sequential tunneling

Abstract

Various causes for negative differential conductance in transport through an interacting double quantum dot are investigated. Particular focus is given to the interplay between the renormalization of the energy levels due to the coupling to the leads and the decoherence of the states. The calculations are performed within a basis of many-particle eigenstates and we consider the dynamics given by the von Neumann-equation taking into account also processes beyond sequential tunneling. A systematic comparison between the levels of approximation and also with different formalisms is performed. It is found that the current is qualitatively well described by sequential processes as long as the temperature is larger than the level broadening induced by the contacts.

11 pages, 5 figures included in text

References in corpus (6)

• Kondo effect in quantum dots
• Quantum master equation for electron transport through quantum dots and single molecules
• Tunneling through nanosystems: Combining broadening with many-particle states
• Direct control of the tunnel splitting in a one-electron double quantum dot
• Shot noise in transport through "double quantum dots"
• Shot noise in tunneling through a single quantum dot

Cited by in corpus (37)

• Decoherence and lead induced inter-dot coupling in nonequilibrium electron transport through interacting quantum dots: A hierarchical quantum master equation approach
• Electron counting in quantum dots
• A benzene interference single-electron transistor
• Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
• Transport Statistics of Interacting Double Dot Systems: Coherent and Non-Markovian Effects
• Green function techniques in the treatment of quantum transport at the molecular scale
• Electron Transport through Nanosystems Driven by Coulomb Scattering
• The formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution
• Interference effects in the Coulomb blockade regime: current blocking and spin preparation in symmetric nanojunctions
• Coherence and Spatial Resolution of Transport in Quantum Cascade Lasers
• Theory of spin blockade, charge ratchet effect, and thermoelectrical behavior in serially coupled quantum-dot system
• Sharp peaks in the conductance of double quantum dot and quantum dot spin-valve systems at high temperatures: A hierarchical quantum master equation approach
• Counting statistics of cotunneling electrons
• QmeQ 1.0: An open-source Python package for calculations of transport through quantum dot devices
• Five approaches to exact open-system dynamics: Complete positivity, divisibility and time-dependent observables
• Modeling of cotunneling in quantum dot systems
• Detecting single-electron tunneling involving virtual processes in real time
• A diagrammatic description of the equations of motion, current, and noise within the second-order von Neumann approach
• First-order coherent resonant tunneling through an interacting coupled-quantum-dot interferometer: generic quantum rate equations and current noise
• Transient Dynamics of Confined Charges in Quantum Dots in the Sequential Tunnelling Regime
• Distribution of waiting times between electron cotunnelings
• Canyon of Current Suppression in an interacting two-level Quantum Dot
• Andreev tunneling through a double quantum-dot system coupled to a ferromagnet and a superconductor: effects of mean field electronic correlations
• Finite coupling effects in double quantum dots near equilibrium
• Density-operator evolution: Complete positivity and the Keldysh real-time expansion
• The connection between time-local and time-nonlocal perturbation expansions
• Interplay between interference and Coulomb interaction in the ferromagnetic Anderson model with applied magnetic field
• Violation of Onsager's theorem in approximate master equation approaches
• Transport in serial spinful multiple-dot systems: The role of electron-electron interactions and coherences
• Time-dependent quantum transport through an interacting quantum dot beyond sequential tunneling: second-order quantum rate equations
• Non-Markovian Dynamics of Charge Carriers in Quantum Dots
• Self-consistent electron counting statistics
• Maximal steady-state entanglement in autonomous quantum thermal machines
• Noise calculations within the second-order von Neumann approach
• Thermopower signatures and spectroscopy of the canyon of conductance suppression
• Non-Markovian full counting statistics in quantum dot molecules
• Spin-current rectification through a quantum dot using temperature bias