量子相干优化量子电池的充电性能  

Optimizing charging performance of quantum battery via quantum coherence

作　　者：李海[1] 陈笑添 郝亚明 LI Hai;CHEN Xiaotian;HAO Yaming(College of Information and Electronic Engineering,Shandong Technology and Business University,Yantai,Shandong 264005,China)

机构地区：[1]山东工商学院信息与电子工程学院,山东烟台264005

出　　处：《光电子．激光》2023年第11期1129-1134,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(11547036);烟台市科技创新发展计划基金项目(2022JCYJ044)资助项目。

摘　　要：探索如何利用量子相干实现量子电池(quantum battery,QB)性能优化是有趣的实际问题。本文构建了一多能级量子系统在相干辅助库下充电的QB模型。基于碰撞模型框架,推导了弱相互作用下QB演化的量子主方程(quantum master equation,QME),并借助Ket-Bra纠缠态方法求得QME的解。结合数值模拟,分析了辅助库中量子相干(相干强度和相干相位)对QB最大可提取功的影响;揭示了在一定条件下量子相干可扮演QB“燃料”的角色——有效提升QB的充电性能。It is an interesting and practical problem to explore how to optimize the performance of quantum battery(QB) via quantum coherence.A QB model of a multi-level quantum system charged in a coherent auxiliary bath is constructed in this paper.Within the framework of collision model,the quantum master equation(QME) of QB charging in weak interaction regime is derived,and the solution of QME is obtained by the Ket-Bra entangled state method.Combining with numerical simulations,the influences of quantum coherence(the coherence magnitude and the coherence phases) on the maximal extractable work of QB are analyzed.It is revealed that quantum coherence,under certain conditions,can play the role of QB′s “fuel” to effectively improve the charging performance of QB.

关 键 词：量子电池(QB) 量子相干 量子主方程(QME) 最大可提取功 

分 类 号：O413[理学—理论物理]