Nonequilibrium Transport through a Kondo Dot: Decoherence Effects

Abstract

We investigate the effects of voltage induced spin-relaxation in a quantum dot in the Kondo regime. Using nonequilibrium perturbation theory, we determine the joint effect of self-energy and vertex corrections to the conduction electron T-matrix in the limit of transport voltage much larger than temperature. The logarithmic divergences, developing near the different chemical potentials of the leads, are found to be cut off by spin-relaxation rates, implying that the nonequilibrium Kondo-problem remains at weak coupling as long as voltage is much larger than the Kondo temperature.

16 pages, 4 figures

References in corpus (19)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• The Kondo Effect in the Unitary Limit
• Kondo physics in carbon nanotubes
• The Anderson Model out of Equilibrium: Non-Crossing-Approximation Approach to Transport through a Quantum Dot
• Universality of the Kondo Effect in a Quantum Dot out of Equilibrium
• Non-Equilibrium Transport through a Kondo-Dot in a Magnetic Field: Perturbation Theory and Poor Man's Scaling
• The Kondo effect in quantum dots at high voltage: Universality and scaling
• Suppression of Kondo effect in a quantum dot by external irradiation
• Real-time renormalization group and charge fluctuations in quantum dots
• Nonequilibrium Transport through a Kondo Dot in a Magnetic Field: Perturbation Theory
• On the perturbative expansion of the magnetization in the out-of-equilibrium Kondo model
• Spectral function of the Kondo model in high magnetic fields
• Spin-spin correlators in Majorana representation
• Is the quantum dot at large bias a weak-coupling problem?
• Spin dynamics from Majorana fermions
• Fermi edge singularity in a non-equilibrium system
• Resonance Kondo Tunneling through a Double Quantum Dot at Finite Bias

Cited by in corpus (67)

• Molecular Transport Junctions: Vibrational Effects
• Non-equilibrium quantum condensation in an incoherently pumped dissipative system
• A perturbative nonequilibrium renormalization group method for dissipative quantum mechanics: Real-time RG in frequency space (RTRG-FS)
• Numerically exact path integral simulation of nonequilibrium quantum transport and dissipation
• Nonequilibrium Singlet-Triplet Kondo Effect in Carbon Nanotubes
• Weak-coupling quantum Monte Carlo calculations on the Keldysh contour: theory and application to the current-voltage characteristics of the Anderson model
• Scaling and Decoherence in the Out-of-Equilibrium Kondo Model
• Universal aspects of non-equilibrium currents in a quantum dot
• Probing the Kondo density of states in a three-terminal quantum ring
• The Kondo Effect in Non-Equilibrium Quantum Dots: Perturbative Renormalization Group
• Mean field theory and fluctuation spectrum of a pumped, decaying Bose-Fermi system across the quantum condensation transition
• Auxiliary master equation approach within matrix product states: Spectral properties of the nonequilibrium Anderson impurity model
• Nonequilibrium Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads
• Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
• Transport spectroscopy of Kondo quantum dots coupled by RKKY interaction
• Quantum Noise Measurement of a Carbon Nanotube Quantum Dot in the Kondo Regime
• Real-time renormalization group in frequency space: A 2-loop analysis of the nonequilibrium anisotropic Kondo model at finite magnetic field
• Anderson Model out of equilibrium: decoherence effects in transport through a quantum dot
• Non-Equilibrium Quantum Dissipation
• Tunneling through triple quantum dots with mirror symmetry
• Coulomb Gas on the Keldysh Contour: Anderson-Yuval-Hamann representation of the Nonequilibrium Two Level System
• Quantum Criticality out of Equilibrium: Steady State in a Magnetic Single-Electron Transistor
• Non-Equilibrium Kondo Model with Voltage Bias in a Magnetic Field
• Transport mirages in single-molecule devices
• Non-equilibrium conductance of a three-terminal quantum dot in the Kondo regime: Perturbative Renormalization Group
• Nonequilibrium transport in quantum impurity models: Exact path integral simulations
• Non-equilibrium current and noise in inelastic tunneling through a magnetic atom
• Frequency-dependent transport through a quantum dot in the Kondo regime
• Kondo Resonance Decoherence by an External Potential
• Flow Equation Calculation of Transient and Steady State Currents in the Anderson Impurity Model
• 1/N expansion of the nonequilibrium infinite-U Anderson Model
• Dynamical spin-spin correlation functions in the Kondo model out of equilibrium
• Transport through a Kondo quantum dot: Functional RG approach
• Electron Transport through a Molecular Conductor with Center-of-Mass Motion
• Emission Noise and High Frequency Cut-Off of the Kondo Effect in a Quantum Dot
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Non-Equilibrium Scaling Analysis of the Kondo Model with Voltage Bias
• Inelastic cotunneling induced decoherence and relaxation, charge and spin currents in an interacting quantum dot under a magnetic field
• Feynman-Vernon influence functional approach to quantum transport in interacting nanojunctions: An analytical hierarchical study
• Finite-frequency-dependent noise of a quantum dot in a magnetic field
• Nonequilibrium Spin Noise and Noise of Susceptibility
• Current induced decoherence in the multichannel Kondo problem
• Stable two-channel Kondo fixed point of an SU(3) quantum defect in a metal: renormalization group analysis and conductance spikes
• Nonequilibrium Cotunneling through a Three-Level Quantum Dot
• Correlations in non-equilibrium Luttinger liquid and singular Fredholm determinants
• Zero bias anomaly out of equilibrium
• Transport properties of fully screened Kondo models
• Non-equilibrium quantum transport through a dissipative resonant level
• Transconductance of a double quantum dot system in the Kondo regime
• Double Quantum Dot scenario for spin resonance in current noise
• Renormalization-group analysis of a spin-1 Kondo dot: Non-equilibrium transport and relaxation dynamics
• Decoherence and Dephasing in Kondo Tunneling through Double Quantum Dots
• Electronic Green's functions in a T-shaped multi-quantum dot system
• Coulomb oscillations of the Fano-Kondo effect and zero bias anomalies in the double dot meso-transistor
• Single impurity Anderson model out of equilibrium: A two-particle semi-analytic approach
• Quantum noise in carbon nanotubes as a probe of correlations in the Kondo regime
• Spin and orbital fluctuations in non-equilibrium transport through quantum dots: A renormalisation-group analysis
• Quantum criticality in Kondo quantum dot coupled to helical edge states of interacting 2D topological insulators
• Collapse of the Josephson emission in a carbon nanotube junction in the Kondo regime
• Nonequilibrium transport through parallel double quantum dots in the Kondo regime
• External field induced switching of tunneling current in the coupled quantum dots
• Non-equilibrium Scaling Properties of a Double Quantum Dot System: Comparison between Perturbative Renormalization Group and Flow Equation Approach
• Rotational Quantum Impurities in a Metal: Stability of the 2-Channel Kondo Fixed Point in a Magnetic Field
• High-order current correlation functions in Kondo systems
• Dynamical properties of a nonequilibrium quantum dot close to localized-delocalized quantum phase transitions
• Energy relaxation due to magnetic impurities in mesoscopic wires: Logarithmic approach
• Theory of single molecule NMR detected by real time ESR