Charging power enhancement at the phase transition of a non-integrable quantum battery

TL;DR

This paper demonstrates that quantum phase transitions in non-integrable quantum batteries can significantly enhance charging power, providing insights for designing more efficient quantum energy storage systems.

Contribution

It shows that criticality in a non-integrable quantum model can boost charging power, extending previous integrable model results to more realistic systems.

Findings

Criticality enhances charging power in non-integrable quantum batteries.

The study uses a one-dimensional Axial Next-Nearest-Neighbor Ising model.

Results are relevant for experimental quantum simulation platforms.

Abstract

Exploiting many-body interaction and critical phenomena to improve the performance of quantum batteries is an emerging and promising line of research. A central question in this direction is whether quantum phase transitions can enhance the charging energy or the power. While preliminary works have addressed this problem in fine-tuned integrable models, its characterization in non-integrable systems remains limited due to the demanding numerical requirements. Here, we investigate a one-dimensional Axial Next-Nearest-Neighbor Ising model as an example of non-integrable quantum battery charged via a quantum-quench protocol. In contrast to integrable cases, we find that criticality in this setting can lead to a pronounced enhancement of the charging power. Our findings inform quantum-battery design of many-qubit systems and are amenable to experimental verification on current quantum-simulation platforms, including neutral-atom arrays.