We study the photoelectric current generated by a driving light with nonclassical photon statistics. Due to the nonclassical input photon statistics, it is no longer enough to treat the driving light as a planar wave as in classical physics. We make a quantum approach to study such problems, and find that: when the driving light starts from a coherent state as the initial state, our quantum treatment well returns the quasi-classical driving description; when the the driving light is a generic state with a certain P function, the full system dynamics can be reduced as the P function average of many "branches" -- in each dynamics branch, the driving light starts from a coherent state, thus again the system dynamics can be obtained in the above quasi-classical way. Based on this quantum approach, it turns out the different photon statistics does make differences to the photoelectric current. Among all the classical light states with the same light intensity, we prove that the input light with Poisson statistics generates the largest photoelectric current, while a nonclassical sub-Poisson light could exceed this classical upper bound.

中文翻译：

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非经典光增强光电流

我们使用非经典光子统计研究由驱动灯产生的光电流。由于非经典的输入光子统计数据，将驱动光视为经典物理学中的平面波已不再足够。我们用量子方法研究此类问题，发现：当驱动光从相干态作为初始状态开始时，我们的量子处理很好地返回了准经典驱动描述；当行车灯是具有一定P函数的通用状态时，整个系统动力学可以减少为许多“分支”的P函数平均值——在每个动力学分支中，行车灯从相干状态开始，因此再次系统动力学可以通过上述准经典方法获得。基于这种量子方法，事实证明，不同的光子统计数据确实会对光电流产生影响。在所有具有相同光强的经典光态中，我们证明了具有泊松统计的输入光产生的光电流最大，而非经典的亚泊松光可以超过这个经典上限。