Using Dark States to Charge and Stabilize Open Quantum Batteries
James Q. Quach, William J. Munro
Abstract
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.
Topics & Concepts
SpinsPhysicsPower (physics)QuantumCharge (physics)Quantum interferenceInterference (communication)Quantum mechanicsQuantum stateBattery (electricity)State (computer science)Power densitySpin (aerodynamics)Condensed matter physicsDensity of statesDark stateAtomic physicsSteady state (chemistry)Topology (electrical circuits)Quantum and electron transport phenomenaQuantum many-body systemsMechanical and Optical Resonators