ac-dc voltage profile and four point impedance of a quantum driven system

TL;DR

This paper explores the behavior of time-dependent voltage drops and impedance in a quantum conductor driven by ac fields, introducing new concepts and analyzing a quantum pump model with phase-lagged ac voltages.

Contribution

It introduces the concepts of ac-dc local voltage and four point impedance in driven quantum systems and analyzes their properties in a quantum pump model.

Findings

Defined ac-dc local voltage and four point impedance for quantum systems

Analyzed properties of these quantities in a quantum pump model

Provided insights into voltage behavior in periodically driven quantum conductors

Abstract

We investigate the behavior of the time-dependent voltage drop in a periodically driven quantum conductor sensed by weakly coupled dynamical voltages probes. We introduce the concepts of ac-dc local voltage and four point impedance in an electronic system driven by ac fields. We discuss the properties of the different components of these quantities in a simple model of a quantum pump, where two ac voltages oscillating with a phase lag are applied at the walls of a quantum dot.