Charging power and stability of always-on transitionless driven quantum batteries

TL;DR

This paper introduces a transitionless quantum driving charger for quantum batteries that enables fast, stable, and always-on energy transfer with robustness against timing fluctuations, advancing quantum network energy storage.

Contribution

It proposes a novel TQD-based charger design that achieves rapid, stable, and always-on charging of quantum batteries with controllable dynamics and robustness.

Findings

The TQD charger allows for fast and stable energy transfer.

The charger can be disconnected at any time without energy backflow.

The approach is robust against timing fluctuations.

Abstract

The storage and transfer of energy through quantum batteries are key elements in quantum networks. Here, we propose a charger design based on transitionless quantum driving (TQD), which allows for inherent control over the battery charging time, with the speed of charging coming at the cost of the internal energy available to implement the dynamics. Moreover, the TQD-based charger is also shown to be locally stable, which means that the charger can be disconnected from the quantum battery (QB) at any time after the energy transfer to the QB, with no fully energy backflow to the charger. This provides a highly charged QB in an always-on asymptotic regime. We illustrate the robustness of the QB charge against time fluctuations and the full control over the evolution time for a feasible TQD-based charger.