论文标题
空腔 - 赫森伯格自旋链量子电池
Cavity-Heisenberg spin chain quantum battery
论文作者
论文摘要
我们提出了一个空腔 - 海森贝格自旋链（CHS）量子电池（QB），并进行了远距离相互作用，并研究了其充电过程。与海森堡自旋链（HS）QB相比，CHS QB的性能显着提高。当旋转$ n \ gg 1 $的数量时，可以获得QB最大充电能力的量子优势$α$，大约满足超级线性缩放关系$ p_ p_ {max} \ propto n^α$。对于CHS QB，$α$可以达到甚至超过$ 1.5 $，而HS QB只能达到$α= 0.75 $。我们发现CHS QB的最大存储能量具有关键现象。通过分析Wigner函数，von Neumann熵和对数负性，我们证明纠缠可能是QB存储更多能量但不够的必要成分。
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 $α$ of the QB's maximum charging power can be obtained, which approximately satisfies a superlinear scaling relation $P_{max} \propto N^α$. For the CHS QB, $α$ can reach and even exceed $1.5$, while the HS QB can only reach about $α=0.75$. 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.
