Enhancing the charging performance of quantum batteries with the work medium of an entangled coupled-cavity array
Hong-Bing Ma, Kai Dong Xu, Hong-Guo Li, Zong-Guo Li, Han‐Jie Zhu · Physical Review A · 2024
Although entanglement is considered as a crucial resource for quantum information processing, it is still unknown whether the presence of quantum entanglement in the working medium can enhance the charging performance of a quantum battery (QB). Here, we address this problem by considering a QB with working medium consisted of an entangled coupled-cavity array. We show that the optimal charging performance of the QB is achieved in the two-cavity case when cavities are initially in a maximum entangled state without cavity couplings. We then extend our discussion to multicavity case. It is demonstrated that the charging power of the QB under an entangled coupled-cavity array can be further enhanced by increasing the number of cavities. Our findings reveal the advantage of an entangled working medium in enhancing the charging performance of a QB, and therefore, contribute to the experimental realization of quantum batteries with excellent performance.