Environment-mediated charging process of quantum batteries

TL;DR

This paper investigates how open quantum batteries can be charged through environment-mediated processes, highlighting the roles of non-Markovian and Markovian dynamics, and proposing experimental exploration of ergotropy.

Contribution

It introduces a novel environment-mediated charging mechanism for quantum batteries, including wireless-like charging in non-Markovian regimes and analysis of collective emission effects.

Findings

Quantum batteries can be charged without direct interaction in strong coupling regimes.

Markovian dynamics enable satisfactory charging using underdamped regimes and external fields.

Subradiant states enhance robustness of quantum batteries.

Abstract

We study the charging process of open quantum batteries mediated by a common dissipative environment in two different scenarios. In the first case, we consider a quantum charger-battery model in the presence of a non-Markovian environment. Where the battery can be properly charged in a strong coupling regime, without any external power and any direct interaction with the charger, i.e., a wireless-like charging happens. The environment plays a major role in the charging of the battery, while this does not happen in a weak coupling regime. In the second scenario, we show the effect of individual and collective spontaneous emission rates on the charging process of quantum batteries by considering a two-qubit system in the presence of Markovian dynamics. Our results demonstrate that open batteries can be satisfactorily charged in Markovian dynamics by employing an underdamped regime and/or strong external fields. We also present a robust battery by taking into account subradiant states and an intermediate regime. Moreover, we propose an experimental setup to explore the ergotropy in the first scenario.