论文标题
量子电池，带有非热电器充电
Quantum battery with non-Hermitian charging
论文作者
论文摘要
我们提出了一种量子电池的设计，该量子电池利用了非热汉密顿的充电器。特别是，从相互作用（非相互作用）的哈密顿量作为电池的地面或热状态开始，电池的充电是通过平均时间（PT）和旋转时间（RT）（RT） - 对称汉密尔顿以存储能量的。我们报告说，与带有Hermitian充电器的电池相比，与非热汉密尔顿的这种淬火导致功率输出增强。我们确定参数空间中提供性能增益的区域。我们还证明，随着PT和RT对称充电器的电池系统尺寸的增加，改进的效果持续存在。在PT对称情况下，尽管XY模型的各向异性无助于性能，但我们表明，XXZ模型作为具有非官方充电器的电池的性能优于具有某些相互作用强度的XX模型的电池。我们还表明，即使在初始状态的有限温度下，非热性的优势仍然有效。
We propose a design of a quantum battery exploiting the non-Hermitian Hamiltonian as a charger. In particular, starting with the ground or the thermal state of the interacting (non-interacting) Hamiltonian as the battery, the charging of the battery is performed via parity-time (PT)- and rotational-time (RT)-symmetric Hamiltonian to store energy. We report that such a quenching with a non-Hermitian Hamiltonian leads to an enhanced power output compared to a battery with a Hermitian charger. We identify the region in the parameter space which provides the gain in performance. We also demonstrate that the improvements persist with the increase of system size for batteries with both PT- and RT-symmetric chargers. In the PT-symmetric case, although the anisotropy of the XY model does not help in the performance, we show that the XXZ model as a battery with a non-Hermitian charger performs better than that of the XX model having certain interaction strengths. We also exhibit that the advantage of non-Hermiticity remains valid even at finite temperatures in the initial states.
