Zero-Current Voltage Fluctuations in Quantum Dots at High Magnetic Fields

Abstract

We demonstrate the generation of zero-current voltage fluctuations in quantum dots at high magnetic fields, where one or more edge states (ES) are trapped within the dot. While currently unable to provide a definitive model for the generation of the noise, we propose a possible mechanism in which time-dependent perturbations to the dot geometry, give rise to corresponding fluctuations in the coupling between the transmitted and confined ES. In other words, the voltage noise is thought to be a direct probe, of the time-dependent motion of the electronic distribution within the dot.