发表机构
College of Science, Nanjing University of Posts and Telecommunications; Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy（南京邮电大学理学院; 江苏省低维物理与新能源工程研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在级联碰撞模型中提出自适应测量方案，实现双量子比特量子电池充电能量的均匀性，解析证明激发态可完全抑制波动，叠加态则受限于相位依赖动力学。
AI 中文摘要
充电在不同试验中的均匀性是可靠量子电池的基本要求。然而，固有的量子随机性对这一目标构成了根本性挑战。本研究在级联碰撞模型框架内研究了一个双量子比特量子电池。我们提出在每次碰撞后对充电器进行自适应测量，产生两个条件电池态，其期望存储能量相等。对于制备在激发态的充电器，我们解析地证明了完全抑制依赖轨迹的存储能量波动是可实现的；对于制备在一般叠加态的充电器，我们的理论揭示，由于依赖电池相位的递归动力学，完全抑制从根本上被禁止。数值模拟与理论预测在定量上高度一致。这些发现为高均匀性量子电池充电提供了一条可行途径。
英文摘要
Charging uniformity across distinct trials is an essential requirement for reliable quantum batteries. Nevertheless, intrinsic quantum stochasticity poses a fundamental challenge to this goal. This work investigates a two-qubit quantum battery within the framework of cascaded collision models. We propose an adaptive measurement on the charger after each collision, yielding two conditional battery states of equal expected stored energy. For chargers prepared in the excited state, we analytically prove that complete suppression of trajectory-dependent stored-energy fluctuations is attainable; for chargers prepared in general superposition states, our theory reveals that full suppression is fundamentally prohibited owing to battery-phase-dependent recursive dynamics. Numerical simulations are in excellent quantitative agreement with theoretical predictions. These findings provide a feasible pathway toward high-uniformity quantum-battery charging.
Comments6 pages, 3 figures
