论文标题
驱动量子电池的充电和能量波动
Charging and energy fluctuations of a driven quantum battery
论文作者
论文摘要
我们将建模的量子电池视为由n独立的两级量子系统，该系统由时间依赖的经典源驱动。通过数值方法和合适的分析近似方案，以广泛的参数来表征不同的功绩数字，例如存储的能量，充电时间和充电过程中能量量子波动。特别强调了不同初始条件的作用，描述了量子电池的制备状态，以及对外部时间依赖性驱动器功能形式的敏感性。结果表明，从每个两级系统的基础状态开始，可以实现以快速充电时间和没有充电波动的特征的最佳充电协议，而其他纯制剂效率较低。此外，我们认为，定期峰值的矩形脉冲可以导致快速充电。这项研究旨在鉴于未来的实验固态实施，提供有用的理论背景。
We consider a quantum battery modeled as a set of N independent two-level quantum systems driven by a time dependent classical source. Different figures of merit, such as stored energy, time of charging and energy quantum fluctuations during the charging process, are characterized in a wide range of parameters, by means of numerical approach and suitable analytical approximation scheme. Particular emphasis is put on the role of different initial conditions, describing the preparation state of the quantum battery, as well as on the sensitivity to the functional form of the external time-dependent drive. It is shown that an optimal charging protocol, characterized by fast charging time and the absence of charging fluctuations, can be achieved starting from the ground state of each two-level system, while other pure preparation states are less efficient. Moreover, we argue that a periodic train of peaked rectangular pulses can lead to fast charging. This study aims at providing a useful theoretical background in view of future experimental solid-state implementations.
