Sunburst quantum Ising battery under periodic delta-kick charging

TL;DR

This paper investigates a sunburst quantum Ising battery driven by periodic delta-kicks, demonstrating quantum advantage and stability in the chaotic regime, with classical nature of the advantage confirmed.

Contribution

It introduces a novel chaotic quantum Ising battery model showing quantum advantage and stability, contrasting with traditional integrable models.

Findings

Quantum advantage achieved for up to 4 batteries in chaotic regime

Stable energy storage observed in the chaotic regime

Advantage is classical, not due to multipartite entanglement

Abstract

Most quantum batteries studied so far with notable exception of Sachdev-Ye-Kitaev (SYK) batteries are based on integrable models, where superlinear scaling of charging power and hence a quantum advantage can be achieved, but at the cost of unstable stored energy due to integrability. Here, by considering the sunburst quantum Ising battery driven by periodic delta-kicks, we show that in the quantum chaotic regime a quantum advantage is achieved for number of batteries $n_b\leq 4$, together with excellent stability of energy storage. In the integrable regime optimal energy storage and extraction are possible irrespective of the initial state of the charger. Finally, we show that the observed advantage does not originate from multipartite entanglement within the battery subsystem and is therefore classical in nature.