Kicked-ising Quantum Battery Achieves Maximal Charging across Arbitrary System Sizes and Floquet Cycles

Quantum batteries represent a potentially revolutionary advance in energy storage, and scientists are actively exploring designs that harness the unique properties of quantum mechanics to outperform conventional technologies. Sebastián V. Romero, Xi Chen, and Yue Ban are leading investigations into this field, and their recent work introduces the kicked-Ising model as a promising new platform for quantum batteries. This research analytically characterises how energy enters and accumulates within this system, revealing that it can achieve maximum charging efficiency while remaining remarkably stable even with imperfections. The team’s findings demonstrate a clear link between the speed of energy transfer, the scrambling of quantum information, and the way the system is driven, ultimately paving the way for scalable and robust quantum battery designs suitable for real-world implementation and testing on current hardware.

Spin chains represent promising candidates capable of outperforming classical counterparts by utilizing entangled operators. This work introduces the kicked-Ising model as a quantum battery and analytically characterises its charging dynamics within the self-dual operator regime, valid for arbitrary system sizes and Floquet cycles. Employing momentum-space Floquet analysis, researchers obtain exact expressions for energy injection, uncovering the influence of boundary conditions and spin-chain parity on charging performance. The kicked-Ising quantum battery achieves maximal charging while exhibiting these characteristics.

Kicked-Ising Model Achieves Robust Maximal Charging

The kicked-Ising model emerges as a promising quantum battery, demonstrating charging dynamics analytically characterised across arbitrary system sizes and Floquet cycles. Researchers achieved precise expressions for energy injection, revealing how boundary conditions and spin-chain parity influence charging performance. Analytical results, verified with matrix product states, show that the injected energy remains predictable regardless of the number of kicks applied. Implementation on an IBM quantum computer with 104 qubits confirmed these analytical predictions, with experimental data closely aligning with theoretical results.

The stability of the model is highlighted by flat regions in the injected energy curves after the initial kick. For open boundary conditions, the team numerically verified the preparation of specific quantum states at particular kick intervals, demonstrating precise control over the quantum state. To assess robustness, the team introduced disorder into the system parameters, finding that the protocol maintains remarkable performance even with moderate disorder strengths. The average normalized injected energy remains consistent, demonstrating the resilience of the model to realistic experimental imperfections. These results confirm the kicked-Ising quantum battery as a scalable, disorder-resilient protocol and a valuable testbed for assessing quantum platforms.

Entanglement Powers Robust Quantum Battery Performance

This work introduces the kicked-Ising model as a promising quantum battery, demonstrating its efficiency and robustness in storing energy using entangled operators. Researchers analytically characterised the charging dynamics of this model, revealing how energy injection scales with both the number of Floquet cycles and the size of the system. A key finding is the emergence of entanglement growth as a reliable indicator of charging performance, suggesting a strong link between energy storage and quantum correlations. The team demonstrated the stability of the model against parameter fluctuations and timing imperfections, highlighting its practical potential.

Analysis of spin correlations revealed that low-frequency kicks improve energy delocalization and entanglement spreading, offering insights into the underlying mechanisms of charging. Simulations and hardware tests on existing platforms, including trapped ions, ultra-cold atoms, and superconducting transmons, confirm the feasibility of implementing this quantum battery. Future research will focus on extending the model to denser quantum architectures and optimising kick schedules to achieve scalable, high-performance quantum batteries. This work provides a theoretical framework and experimental validation for a robust and efficient energy storage solution with potential applications in future quantum technologies.