论文标题
通过量子加热发动机共同增强了量子电池的高功率和高容量充电
Collectively enhanced high-power and high-capacity charging of quantum batteries via quantum heat engines
论文作者
论文摘要
作为所谓的量子电池（QB）的模型，作为储能的量子自由度，我们研究了由$ n $ n $两级系统（TLSS）组成的多体QB的充电协议（QHES）。与个人充电相比，我们专注于QB充电性能的集体增强效应。 QB的目标是实现充电能力和容量的大量集体增强，同时保持实验性可行性，稳定性以及所需控制和资源的便宜性。我们证明我们的模型实际上表现出这些功能。实际上，我们的协议同时实现了仅具有稳定方式的热能资源和简单的局部交互的渐近性充电和几乎$ n $ order的平均功率增强。由于发动机与电池之间相互作用的对称性引起的紧急玻色量量子统计，该容量被共同增强，从而导致所有TLSS的渐近完美激发。因此，在有效的负温度下，类似超级的合作激发，充电速度及其平均功率共同增强。我们的结果表明，QHes实际上适合QB的充电器，有效利用了集体增强功能，不仅将无序的热能转换为以量子自由度存储的有序能量。
As a model of so-called quantum battery (QB), quantum degrees of freedom as energy storage, we study a charging protocol of a many-body QB consisting of $N$ two-level systems (TLSs) using quantum heat engines (QHEs). We focus on the collective enhancement effects in the charging performance of QBs in comparison to the individual charging. It is a challenging goal of QBs to achieve large collective enhancements in the charging power and the capacity while keeping the experimental feasibility, the stability, and the cheapness of the required control and resources. We show that our model actually exhibits these features. In fact, our protocol simultaneously achieves the asymptotically-perfect charge and almost $N$-order average power enhancement with only thermal energy resource and simple local interactions in a stable manner. The capacity is collectively enhanced due to the emergent bosonic quantum statistics caused by the symmetry of the interaction between the engine and the batteries, which results in asymptotically perfect excitation of all the TLSs. The charging speed, and hence the average power are collectively enhanced by the superradiance-like cooperative excitation in the effective negative temperature. Our results suggest that QHEs actually fit for a charger of QBs, efficiently exploiting the collective enhancements, not only converting the disordered thermal energy to the ordered energy stored in quantum degrees of freedom.
