We introduce an open quantum battery protocol using dark states to achieve both superextensive capacity and power density, with non-interacting spins coupled to a reservoir. Further, our power density actually scales with the of number of spins N in the battery. We show that the enhanced capacity and power is correlated with entanglement. Whilst connected to the charger, the charged state of the battery is a steady state, stabilized through quantum interference in the open system.
@article{arxiv.2002.10044,
title = {Using dark states to charge and stabilise open quantum batteries},
author = {James Q. Quach and William J. Munro},
journal= {arXiv preprint arXiv:2002.10044},
year = {2020}
}