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We propose a cavity Heisenberg-spin-chain (CHS) quantum battery (QB) with the long-range interactions and investigate its charging process. The performance of the CHS QB is substantially improved compared to the Heisenberg spin chain (HS) QB. When the number of spins N1, the quantum advantage of the QB's maximum charging power can be obtained, which approximately satisfies the superlinear scaling relation P₌₀ₗN^. The CHS QB can approach =2 by optimizing the parameters. We find that the maximum stored energy of the CHS QB has a critical phenomenon. By analyzing the Wigner function, von Neumann entropy, and logarithmic negativity, we demonstrate that entanglement can be a necessary ingredient for QB to store more energy, but not sufficient.
Dou et al. (Wed,) studied this question.