Many-body enhancement of energy storage in a waveguide-QED quantum battery

TL;DR

This paper explores how collective effects in waveguide-QED systems can significantly enhance energy storage duration in quantum batteries by reducing energy decay through specific atomic arrangements.

Contribution

It demonstrates that collective effects in waveguide-QED systems can slow down energy self-discharging, improving quantum battery storage times with specific atomic configurations.

Findings

Random atomic arrangements lead to subexponential energy decay.

Ordered lattice arrangements can slow dissipation at specific spacings.

Collective effects enhance energy protection in optical quantum systems.

Abstract

Quantum batteries have demonstrated remarkable charging properties, showing that a quantum advantage is possible in the realm of quantum thermodynamics. However, finding an effective strategy to store energy for long periods remains crucial in these systems. Here, we investigate different configurations of a waveguide-QED system acting as a quantum battery and show that, in this context, collective effects can slow down the self-discharging time of the battery, thus improving the storage time. Specifically, when the artificial atoms of the array are arranged randomly, the energy and ergotropy of the optical system are shown to decay at a subexponential rate over long periods, in contrast to the energy decay of a single atom in a waveguide. In the case of atoms arranged in an ordered lattice, collective effects slow down dissipative discharging only for a specific lattice spacing. Thus, in both configurations, collective effects can be used to boost the energy-protection properties of optical systems.