Avoiding dark states in open quantum systems by tailored initial correlations

TL;DR

This paper proposes a method to prevent dark states in open quantum systems by initializing correlations through a common source, enhancing excitation transport in a V-shaped network.

Contribution

It introduces a novel approach of using tailored initial correlations to avoid dark states, improving quantum transport efficiency.

Findings

Initial correlations can effectively bypass dark states.

Transport efficiency is increased with the proposed method.

The approach is applicable to similar quantum network configurations.

Abstract

We study the transport of excitations on a V-shaped network of three coupled two-level systems that are subjected to an environment that induces incoherent hopping between the nodes. Two of the nodes are coupled to a source while the third node is coupled to a drain. A common feature of these networks is the existence of a dark-state that blocks the transport to the drain. Here we propose a means to avoid this state by a suitable choice of initial correlations, induced by a source that is common to both coupled nodes.