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Quantum batteries are energy storage devices that satisfy quantum mechanicalprinciples. How to obtain analytical solutions for quantum battery systems andachieve a full charging is a crucial element of the quantum battery. Here, weinvestigate the Rosen-Zener quantum battery with $N$ two-level systems, whichincludes atomic interactions and external driving field. The analyticalsolutions of the stored energy, changing power, energy quantum fluctuations,and von Neumann entropy are derived by employing the gauge transformation. Wedemonstrate that full charging process can be achieved when the externaldriving field strength and scanning period conforms to a quantitativerelationship. The local maximum value of the final stored energy corresponds tothe local minimum values of the final energy fluctuations and von Neumannentropy. Moreover, we find that the atomic interaction induces the quantumphase transition and the maximum stored energy of the quantum battery reachesthe maximum value near the quantum phase transition point. Our result providesan insightful theoretical scheme to realize the efficient quantum battery.

Analytically solvable many-body Rosen-Zener quantum battery