论文标题
在两光量Dicke量子电池中充电
Ultrafast charging in a two-photon Dicke quantum battery
论文作者
论文摘要
我们将两个级别系统（例如Qubits）组成的集合嵌入微波炉中，是实现高功率量子电池的有前途的候选人。从这个角度来看，研究了抑制常规单光子耦合的设备的可能性，并研究了主要的相互作用是由两光孔过程介导的，这为充电性能的进一步增强开辟了道路。通过求解具有单光子耦合和两光子耦合的DICKE模型，我们确定了参数的范围，其中后一种非常规相互作用主导了系统的动力学，从而在充电时间和QB的平均充电能力中均能更好地性能，而QB的平均充电能力则与单光子案例相比。此外，检查了最大存储能量，波动和充电功率的缩放，并检查了量子数n的有限数量。尽管能量和波动与n线性尺度，但平均功率的二次增长会导致基于该方案的量子电池的充电性能的相关提高，相对于纯粹的单光子耦合案例。此外，可以表明，通过将耦合从弱方向增加到超强状态，充电过程逐渐更快。
We consider a collection of two level systems, such as qubits, embedded into a microwave cavity as a promising candidate for the realization of high power quantum batteries. In this perspective, the possibility to design devices where the conventional single-photon coupling is suppressed and the dominant interaction is mediated by two-photon processes is investigated, opening the way to an even further enhancement of the charging performance. By solving a Dicke model with both single- and two-photon coupling we determine the range of parameters where the latter unconventional interaction dominates the dynamics of the system leading to better performances both in the charging times and average charging power of the QB compared to the single-photon case. In addition, the scaling of the maximum stored energy, fluctuations and charging power with the finite number of qubits N is inspected. While the energy and fluctuations scale linearly with N, the quadratic growth of the average power leads to a relevant improvement of the charging performance of quantum batteries based on this scheme with respect to the purely single-photon coupling case. Moreover, it is shown that the charging process is progressively faster by increasing the coupling from the weak to the ultra-strong regime.
