论文标题
通过非线性相互作用的非高斯相干状态的出现
Emergence of Non-Gaussian Coherent States Through Nonlinear Interactions
论文作者
论文摘要
相对于光子数的非线性相互作用揭示了相干状态的真实量子性质。我们表征了连贯状态如何通过在进化过程中的wigner函数中出现负值的出现，同时保持其特征性的泊松光子统计。这样的状态具有非最低不确定性，但具有可以达到海森堡极限的计量学优势。光的非高斯性是作为非线性相互作用的一般特性而产生的，非线性相互作用仅需要可极化的介质，共振或色散。我们的结果强调了如何从看似大多数古典的光状态中提取有用的量子特征，这是量子光学应用的相关现象。
Light-matter interactions that are nonlinear with respect to the photon number reveal the true quantum nature of coherent states. We characterize how coherent states depart from Gaussian by the emergence of negative values in their Wigner function during the evolution while maintaining their characteristic Poissonian photon statistics. Such states have non-minimum uncertainty yet present a metrological advantage that can reach the Heisenberg limit. Non-Gaussianity of light arises as a general property of nonlinear interactions, which only requires a polarizable media, resonant or dispersive. Our results highlight how useful quantum features can be extracted from the seemingly most classical states of light, a relevant phenomenon for quantum optics applications.
