近日，北京航空航天大学张国峰团队研究了基于非互易性的多电池系统增强充电。2025年8月19日出版的《物理评论A》杂志发表了这项成果。

量子电池（QBs）利用量子系统传输和存储能量，最近引起了广泛关注，在增强充电容量、增加充电功率和设备小型化方面具有潜力。然而，由于量子节点之间的弱相互作用的限制，QB网络的实现表现出有限的充电性能。

研究组提出了一种利用非互易性来改善多电池系统充电的有效方法。通过构造非厄米Aharonov-Bohm三角形来建立级联和平行构型下的单向能量传递，研究组可以在弱相互作用下显著增强量子点中的存储能量。值得注意的是，非倒数级联装置与倒数级联装置相比，随着充电距离的延长，电池能量的增益呈指数增长。

此外，研究组还证明了非互易性也会导致量子点的充电功率增强，从而加速充电过程。他们的发现为提高QB充电性能提供了切实可行的途径，并展示了构建高效QB网络的潜力。

附：英文原文

Title: Enhanced charging in multibattery systems by nonreciprocity

Author: Hua-Wei Zhao, Yong Xie, Xinyao Huang, Guo-Feng Zhang

Issue&Volume: 2025/08/19

Abstract: Quantum batteries (QBs), harnessing quantum systems to transfer and store energy, have garnered substantial attention recently, enabling potentials in enhanced charging capacity, increased charging power, and device miniaturization. However, constrained by the weak interaction between the quantum nodes, the implementations of QB networks exhibit limited charging performance. In this work, we propose an efficient approach to improving charging in multibattery systems by capitalizing on nonreciprocity. By constructing non-Hermitian Aharonov-Bohm triangles to establish unidirectional energy transfer in both cascaded and parallel configurations, we can achieve a significant enhancement of the stored energy in QBs under weak interaction. Remarkably, the nonreciprocal cascaded setups display an exponentially increasing gain in the battery energy as the charging distance lengthens compared to the reciprocal counterparts. Furthermore, we demonstrate that nonreciprocity can also lead to the same enhancement in the charging power of QBs, accelerating the charging processes. Our findings provide a practical pathway for enhancing the charging performance of QBs and exhibit the potentials for constructing efficient QB networks.

DOI: 10.1103/fbv7-m7sd

Source: https://journals.aps.org/pra/abstract/10.1103/fbv7-m7sd