Correlations between charge and energy current in ac-driven coherent conductors

TL;DR

This paper investigates the relationship between charge and energy currents in ac-driven coherent conductors, focusing on their noise characteristics and the mixed noise correlator, revealing interference effects and new measurement approaches.

Contribution

It introduces the analysis of mixed charge-energy noise in ac-driven conductors, highlighting interference effects and proposing measurement methods for the correlator.

Findings

Mixed noise exhibits interference and transport contributions.

Mixed noise features differ from charge and energy noise.

Measurement of power-charge current correlator reveals mixed noise characteristics.

Abstract

We study transport in coherent conductors driven by a time-periodic bias voltage. We present results of the charge and energy noise and complement them by a study of the mixed noise, namely the zero-frequency correlator between charge and energy current. The mixed noise presents interference contributions and transport contributions, showing features different from those of charge and energy noise. The mixed noise can be accessed by measuring the correlator between the fluctuations of the power provided to the system and the charge current.