论文标题
量子光学元件中相位空间经典仿真问题的双重形式
Dual form of the phase-space classical simulation problem in quantum optics
论文作者
论文摘要
在量子光学元件中，量子状态的非古老性通常与相位空间准稳定性分布的负相关。我们认为，任何具有相位空间函数的经典模拟的不可能是非经典性的必要条件。在爱因斯坦 - 波多尔斯基 - 罗森 - 贝尔的物理现实原理的框架中，分析了这种针对特定测量方案的这种相空间经典模拟的问题。该问题的双重形式导致钟声不平等的类似物。他们的违规意味着不可能进行相位的经典模拟，因此，量子状态的非古老性。我们将此技术应用于象征性的光学测量，例如光封码，包括在不平衡，平衡和八个端口配置中逼真的光子数分辨率和同伴检测的情况。
In quantum optics, nonclassicality of quantum states is commonly associated with negativities of phase-space quasiprobability distributions. We argue that the impossibility of any classical simulations with phase-space functions is a necessary and sufficient condition of nonclassicality. The problem of such phase-space classical simulations for particular measurement schemes is analysed in the framework of Einstein-Podolsky-Rosen-Bell's principles of physical reality. The dual form of this problem results in an analogue of Bell inequalities. Their violations imply the impossibility of phase-space classical simulations and, as a consequence, nonclassicality of quantum states. We apply this technique to emblematic optical measurements such as photocounting, including the cases of realistic photon-number resolution and homodyne detection in unbalanced, balanced, and eight-port configurations.
