Using Dark States to Charge and Stabilize Open Quantum Batteries

We introduce an open quantum-battery protocol using dark states to achieve both superextensive capacity and power density, with noninteracting spins coupled to a reservoir. Further, our power density actually scales with the number of spins N in the battery. We show that the enhanced capacity and power are correlated with entanglement. While connected to the charger, the charged state of the battery is a steady state, stabilized through quantum interference in the open system.