Time-resolved noise of adiabatic quantum pumps

TL;DR

This paper studies the quantum noise characteristics of adiabatic quantum pumps under fast, periodic driving, revealing how slow modulation influences current correlations and can even invert their sign.

Contribution

It provides a detailed analysis of time-resolved quantum noise in driven mesoscopic systems, highlighting the impact of strong drives on current correlations.

Findings

Quantum fluctuations dominate noise at short time scales.

Periodic drive induces a time-modulated current correlation.

Strong drives can invert the sign of current correlations.

Abstract

We investigate quantum-statistical correlation properties of a periodically driven mesoscopic scatterer on a time-scale shorter than the period of a drive. In this limit the intrinsic quantum fluctuations in the system of fermions are the main source of a noise. Nevertheless the effect of a slow periodic drive is clearly visible in a two-time current-current correlation function as a specific periodic in time modulation. In the limit of a strong drive such a modulation can change the sign of a current correlation function.