Vacuum enhanced charging of a quantum battery

TL;DR

This paper demonstrates that vacuum effects in quantum electrodynamics can significantly enhance the charging process of quantum batteries, allowing for increased energy storage and full charging without entropy increase.

Contribution

It introduces a novel vacuum-assisted charging mechanism using an anti-Jaynes Cummings interaction in a Raman setup, surpassing classical charging methods.

Findings

Vacuum effects can boost quantum battery charging efficiency.

Anti-Jaynes Cummings interaction enables full charging with zero entropy.

Quantum vacuum can be harnessed for improved energy storage.

Abstract

Quantum batteries are quantum systems that store energy which can then be used for quantum tasks. One relevant question about such systems concerns the differences and eventual advantages over their classical counterparts, whether in the efficiency of the energy transference, input power, total stored energy or other relevant physical quantities. Here, we show how a purely quantum effect related to the vacuum of the electromagnetic field can enhance the charging of a quantum battery. In particular, we demonstrate how an anti-Jaynes Cummings interaction derived from an off-resonant Raman configuration can be used to increase the stored energy of an effective two-level atom when compared to its classically driven counterpart, eventually achieving full charging of the battery with zero entropic cost.