论文标题
连续变量量子电池中的多模优势
Multimode advantage in continuous variable quantum battery
论文作者
论文摘要
我们根据连续变量（CV）系统的框架为多模量子电池（QB）提供了一个体系结构。我们通过使用一类通用的多模初始状态来检查电池的性能，其参数可以调节以产生可分离的状态和纠缠状态，并且可以在本地和全球范围内通过高斯单位操作在本地充电。分析计算表明，在将功绩作为能量变化的第二瞬间时，可分离状态对于纠缠的两种模式电池的纠缠状态同样有利。为了产生由任意数量的模式组成的稳定量子电池，我们得出了能量波动的紧凑分析形式，并证明对于可分离的高斯初始状态，波动随着模式的增加而减小，从而获得了缩放分析。此外，我们证明，作为充电器的局部位移比涉及挤压统一操作的能量波动更最小化。
We provide an architecture for a multimode quantum battery (QB) based on the framework of continuous variable (CV) systems. We examine the performance of the battery by using a generic class of multimode initial states whose parameters can be tuned to produce separable as well as entangled states and that can be charged locally as well as globally by Gaussian unitary operations. Analytical calculations show that a separable state is equally advantageous to an entangled one for two- and three-mode batteries when taking the figures of merit as the second moments of the change in energy. In order to produce a stable quantum battery consisting of an arbitrary number of modes, we derive compact analytical forms of the energy fluctuations and prove that for a multimode separable Gaussian initial state, fluctuations decrease as the number of modes increases, thereby obtaining a scaling analysis. Moreover, we demonstrate that local displacement as a charger is better for minimizing the fluctuations in energy than that involving the squeezing unitary operation.
