This article investigated the specific effects of quantum entanglement on the performance of single-ion quantum batteries based on a trapped calcium-ion system.The effects of initial entanglement degree on the energy storage and extractable work of a single-ion quantum battery in the presence and absence of initial entanglement are analyzed and compared through numerical simulations of von Neumann entropy,stored energy,and extractable work.The results show that the maximum stored energy and maximum extractable work of quantum batteries increase with the increase of initial entanglement degree.This theoretical work provides new ideas for realizing ion-based quantum batteries and improving their performance using the resources of entanglement.
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