A computational approach to quantum noise in time-dependent nanoelectronic devices

TL;DR

This paper introduces a computational method to analyze quantum noise in time-dependent nanoelectronic devices, linking noise properties to wave functions, enabling practical numerical calculations for various mesoscopic conductors.

Contribution

It presents a new formalism that relates quantum noise to wave functions, facilitating numerical analysis of noise in time-dependent quantum conductors.

Findings

Derived simple expressions for noise and correlation in quantum conductors

Numerical calculations demonstrated for voltage pulse in 1D conductor

Method applicable to a wide range of mesoscopic systems

Abstract

We derive simple expressions that relate the noise and correlation properties of a general time-dependent quantum conductor to the wave functions of the system. The formalism provides a practical route for numerical calculations of quantum noise in an externally driven system. We illustrate the approach with numerical calculations of the noise properties associated to a voltage pulse applied on a one-dimensional conductor. The methodology is however fully general and can be used for a large class of mesoscopic conductors.