Control of Exciton Transport using Quantum Interference

TL;DR

This paper demonstrates how quantum interference can be used to control exciton transport, enabling the creation of exciton transistors and dissociation mechanisms, with potential applications in nanoscale energy and information flow.

Contribution

It introduces a novel method of controlling exciton transport via quantum interference, including exciton transistor operation and dissociation, within nanoscale molecular assemblies.

Findings

Quantum interference can gate exciton motion.

Exciton dissociation can be achieved without heterojunctions.

Entanglement measures reveal regimes beyond population analysis.

Abstract

It is shown that quantum interference can be employed to create an exciton transistor. An applied potential gates the quasi-particle motion and also discriminates between quasi-particles of differing binding energy. When implemented within nanoscale assemblies, such control elements could mediate the flow of energy and information. Quantum interference can also be used to dissociate excitons as an alternative to using heterojunctions. A finite molecular setting is employed to exhibit the underlying discrete, two-particle, mesoscopic analog to Fano anti-resonance. Selected entanglement measures are shown to distinguish regimes of behavior which cannot be resolved from population dynamics alone.