Finite frequency noise properties of the non-equilibrium Anderson impurity model

Abstract

We analyze the spectrum of the electric-current autocorrelation function (noise power) in the Anderson impurity model biased by a finite transport voltage. Special emphasis is placed on the interplay of non-equilibrium effects and electron-electron interactions. Analytic results are presented for a perturbation expansion in the interaction strength $U$. Compared to the non-interacting setup we find a suppression of noise for finite frequencies in equilibrium and an amplification in non-equilibrium. Furthermore, we use a diagrammatic resummation scheme to obtain non-perturbative results in the regime of intermediate $U$. At finite voltage, the noise spectrum shows sharp peaks at positions related to the Kondo temperature instead of the voltage.

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Cited by in corpus (4)

• Theory of light emission from quantum noise in plasmonic contacts: above-threshold emission from higher-order electron-plasmon scattering
• Finite-frequency noise in a quantum dot with normal and superconducting leads
• Transient noise spectra in resonant tunneling setups: Exactly solvable models
• Extended dissipaton equation of motion for electronic open quantum systems: Application to the Kondo impurity model