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

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.

9 pages, 7 figures, accepted for publication in Physical Review B

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• Electronic transport in molecular junctions: The generalized Kadanoff-Baym ansatz with initial contact and correlations
• Defining the effective temperature of a quantum driven system from current-current correlation functions
• Quantum interference and the time-dependent radiation of nanojunctions
• Chiral heat transport in driven quantum Hall and quantum spin Hall edge states
• Time-resolved impurity-invisibility in graphene nanoribbons
• Interacting electrons in a flat-band system within the Generalized Kadanoff-Baym Ansatz
• Relation Between Local Temperature Gradients and the Direction of Heat Flow in Quantum Driven Systems