Magnetic field effects on the finite-frequency noise and ac conductance of a Kondo quantum dot out of equilibrium

Abstract

We present analytic results for the finite-frequency current noise and the nonequilibrium ac conductance for a Kondo quantum dot in presence of a magnetic field. Using the real-time renormalization group method, we determine the line shape close to resonances and show that while all resonances in the ac conductance are broadened by the transverse spin relaxation rate, the noise at finite field additionally involves the longitudinal rate as well as sharp kinks resulting in singular derivatives. Our results provide a consistent theoretical description of recent experimental data for the emission noise at zero magnetic field, and we propose the extension to finite field for which we present a detailed prediction.

21 pages, 13 figures

References in corpus (22)

• On steady-state currents through nano-devices: a scattering-states numerical renormalization group approach to open quantum systems
• Real-time simulations of nonequilibrium transport in the single-impurity Anderson model
• A perturbative nonequilibrium renormalization group method for dissipative quantum mechanics: Real-time RG in frequency space (RTRG-FS)
• Measurement of finite-frequency current statistics in a single-electron transistor
• Co-tunneling current and shot noise in quantum dots
• Using a quantum dot as a high-frequency shot noise detector
• Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact
• Dynamics of Quantum Noise in a Tunnel Junction under ac Excitation
• Nonequilibrium Kondo model: Crossover from weak to strong coupling
• Full counting statistics for the Kondo dot in the unitary limit
• Quantum Noise Measurement of a Carbon Nanotube Quantum Dot in the Kondo Regime
• Non-Markovian effects in the Quantum noise of interacting nanostructures
• Real-time renormalization group in frequency space: A 2-loop analysis of the nonequilibrium anisotropic Kondo model at finite magnetic field
• Universal lineshape of the Kondo zero-bias anomaly in a quantum dot
• Real-time renormalization group and cutoff scales in nonequilibrium applied to an arbitrary quantum dot in the Coulomb blockade regime
• AC conductance and non-symmetrized noise at finite frequency in quantum wires and carbon nanotubes
• The Kondo crossover in shot noise of a single quantum dot with orbital degeneracy
• Non-equilibrium frequency-dependent noise through a quantum dot: A real time functional renormalization group approach
• Influence of spin waves on transport through a quantum-dot spin valve
• Transient noise spectra in resonant tunneling setups: Exactly solvable models
• Finite frequency noise properties of the non-equilibrium Anderson impurity model
• Noise spectra of an interacting quantum dot

Cited by in corpus (15)

• Auxiliary master equation approach to non-equilibrium correlated impurities
• Nonsymmetrized noise in a quantum dot: Interpretation in terms of energy transfer and coherent superposition of scattering paths
• Finite-frequency noise in a quantum dot with normal and superconducting leads
• Emission Noise in an Interacting Quantum Dot: Role of Inelastic Scattering and Asymmetric Coupling to the Reservoirs
• Emission Noise and High Frequency Cut-Off of the Kondo Effect in a Quantum Dot
• Finite-frequency-dependent noise of a quantum dot in a magnetic field
• Transport properties of fully screened Kondo models
• Finite-frequency noise of interacting single-electron emitters: spectroscopy with higher noise harmonics
• Mechanism of current noise spectrum in a nonequilibirum Kondo dot system
• Quantum noise in carbon nanotubes as a probe of correlations in the Kondo regime
• Spin versus charge noise from Kondo traps
• Collapse of the Josephson emission in a carbon nanotube junction in the Kondo regime
• Finite-frequency noise in a non-interacting quantum dot
• Dynamics of open quantum systems
• Non-symmetrized quantum noise in a Kondo quantum dot