Excitation-transport in open quantum networks: The effects of configurations

TL;DR

This paper investigates how the configuration and connectivity of open quantum networks influence environment-assisted excitation transport efficiency, highlighting the importance of network structure over non-Markovian effects.

Contribution

It reveals the critical role of network configuration and connectivity in excitation transport enhancement, emphasizing the interplay of direct and indirect connections.

Findings

Connectivity significantly affects transport efficiency.

Non-Markovianity is not essential for enhancement.

Network structure determines environment-assisted effects.

Abstract

We study the environment-assisted enhancement of the excitation-transport efficiency across a network of interacting quantum particles or sites. Our study reveals a crucial influence of the network configuration - and especially its degree of connectivity - on the amount of environment-supported enhancement. In particular, we find a significant interplay of direct and indirect connections between excitation sending and receiving sites. On the other hand, the non-Markovianity induced by memory-bearing, finite sized environments does not seem to provide a critical resource for the enhanced excitation-transport mechanism.