Cavity Magnomechanical Framework for a Highly Efficient Quantum Battery

ABSTRACT We propose a highly efficient quantum battery architecture based on the cavity magnomechanical system. Through theoretical modeling and numerical analysis, the charging dynamics and performance optimization are systematically investigated. The model innovatively couples two identical two‐level atoms to a charging system comprising a microwave cavity, a magnon mode, and a phonon mode, achieving efficient energy storage via coherent energy exchange. The study reveals non‐trivial synergistic and competitive relationships among the coupling strengths, demonstrating that parameter optimization can significantly enhance the battery's energy storage efficiency and extractable work. This work provides clear design principles and a theoretical framework for quantum batteries based on cavity magnonic platforms, offering important guidance for the realization of high‐performance quantum energy storage systems.