Cavity-Heisenberg spin chain quantum battery

• URL: http://arxiv.org/abs/2206.10181v1
• Date: Tue, 21 Jun 2022 08:29:14 GMT
• Title: Cavity-Heisenberg spin chain quantum battery
• Authors: Fu-Quan Dou, Hang Zhou, Jian-An Sun
• Abstract summary: We propose a cavity-Heisenberg spin chain quantum battery 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. We find that the maximum stored energy of the CHS QB has a critical phenomenon.
• Score: 7.3445112624891316
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 $N \gg 1$, the quantum advantage $\alpha$ of the QB's maximum charging power can be obtained, which approximately satisfies a superlinear scaling relation $P_{max} \propto N^{\alpha}$. For the CHS QB, $\alpha$ can reach and even exceed $1.5$, while the HS QB can only reach about $\alpha=0.75$. 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.

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