Quantum transport and momentum conserving dephasing

TL;DR

This paper investigates how momentum-conserving dephasing affects quantum transport in disordered chains, providing insights into conductance behavior at higher temperatures despite phononic interactions.

Contribution

It introduces a novel model linking dephasing reservoirs directly to transport channels, enabling the study of momentum-conserving dephasing effects.

Findings

Numerical confirmation of theoretical predictions

Model demonstrates conductance quantization at higher temperatures

Shows impact of momentum-conserving dephasing on transport

Abstract

We study numerically the influence of momentum-conserving dephasing on the transport in a disordered chain of scatterers. Loss of phase memory is caused by coupling the transport channels to dephasing reservoirs. In contrast to previously used models, the dephasing reservoirs are linked to the transport channels between the scatterers, and momentum conserving dephasing can be investigated. Our setup provides a model for nanosystems exhibiting conductance quantization at higher temperatures in spite of the presence of phononic interaction. We are able to confirm numerically some theoretical predictions.