# Enhancing quantum transport efficiency by tuning non-Markovian dephasing

## TL;DR

This paper demonstrates that non-Markovian dephasing can significantly improve quantum energy transport efficiency in coupled quantum systems, offering insights for designing low-dissipation quantum devices.

## Contribution

It introduces a realistic non-Markovian model showing enhanced quantum transport and compares it to the Markovian case, linking engineered environments with energy transport.

## Key findings

- Non-Markovian dephasing enhances quantum transport efficiency.
- Transport is optimized at specific internal coupling strengths.
- Non-Markovian effects outperform Markovian in dephasing-assisted transport.

## Abstract

We consider the problem of energy transport in a chain of coupled dissipative quantum systems in the presence of non-Markovian dephasing. We use a model of non-Markovianity which is experimentally realizable in the context of controlled quantum systems. We show that non-Markovian dephasing can significantly enhance quantum transport, and we characterize this phenomenon in terms of internal coupling strengths of the chain for some chain lengths. Finally, we show that the phenomenon of dephasing-assisted quantum transport is also enhanced in the non-Markovian scenario when compared to the Markovian case. Our work brings together engineered environments, which are a reality in quantum technologies, and energy transport, which is typically discussed in terms of complex molecular systems. We then expect that it may motivate experimental work and further theoretical investigations on resources which can enhance transport efficiency in a controllable way. This can help in the design of quantum devices with lower dissipation rates, an important concern in any practical application.