Kicked-Ising Quantum Battery

TL;DR

This paper introduces a kicked-Ising model as a quantum battery, analytically characterizing its charging dynamics, and demonstrating its robustness, efficiency, and experimental feasibility through theoretical analysis, simulations, and hardware verification.

Contribution

The paper presents an exact analytical framework for the kicked-Ising quantum battery, including novel protocols for faster charging and experimental validation on IBM hardware.

Findings

Maximal charging achieved with robustness against disorder.

Enhanced protocols enable faster, more efficient energy injection.

Low-frequency driving improves energy injection and relates to scrambling.

Abstract

Quantum batteries (QBs) have emerged as promising candidates capable of outperforming classical counterparts by utilizing entangled operators. Spin chains, in particular, exhibit unique {charging} properties across diverse settings. Here, we introduce the kicked-Ising model as a QB and analytically characterize its charging dynamics within the self-dual operator regime, valid for arbitrary system sizes and Floquet cycles. Using Clifford quantum cellular automata and momentum-space Floquet analysis with the Cayley-Hamilton theorem, we obtain exact expressions for energy injection, uncovering the influence of boundary conditions and spin-chain parity on charging performance. The kicked-Ising QB achieves maximal charging while exhibiting remarkable robustness against disorder. We further propose an intensified protocol within a fixed time window that enables faster and more efficient energy injection, while non-uniform kick schedules enhance experimental flexibility. Spin correlators analysis further shows that low-frequency driving boosts energy injection, highlighting a clear connection between charging, scrambling, and kick-induced delocalization. Our theoretical framework are supported by tensor-network simulations and finally verified on IBM quantum hardware. Accounting for platform-specific constraints, we demonstrate that the kicked-Ising QB offers a scalable, disorder-resilient protocol and testbed to assess quantum platforms.