Floquet Engineering to Reactivate a Dissipative Quantum Battery

TL;DR

This paper introduces a Floquet engineering approach to suppress decoherence in quantum batteries, enabling their cyclic operation despite environmental dissipation, by forming Floquet bound states in the system.

Contribution

It proposes a novel mechanism using Floquet bound states to reactivate dissipative quantum batteries, providing practical guidelines for implementation.

Findings

Decoherence suppression via Floquet bound states

Restoration of cyclic operation in dissipative environments

Guidelines for practical realization of quantum batteries

Abstract

As an energy storing and converting device near atomic size, a quantum battery (QB) promises enhanced charging power and extractable work using quantum resources. However, the ubiquitous decoherence causes its cyclic charging-storing-discharging process to become deactivated, which is called aging of the QB. Here, we propose a mechanism to overcome the aging of a QB. It is found that the decoherence of the QB is suppressed when two Floquet bound states (FBSs) are formed in the quasienergy spectrum of the total system consisting of the QB-charger setup and their respective environments. As long as either the quasienergies of the two FBSs are degenerate or the QB-charger coupling is large in the presence of two FBSs, the QB exposed to the dissipative environments returns to its near-ideal cyclic stage. Our result supplies an insightful guideline to realize the QB in practice using Floquet engineering.