论文标题
在粗粒度测量下连续可变化的非古典性检测
Continuous-Variable Nonclassicality Detection under Coarse-Grained Measurement
论文作者
论文摘要
粗晶状是逼真的量子测量的常见不完美，阻碍了量子特征的直接观察。在高度粗粒的测量中，我们在实验中检测到高斯和非高斯状态的连续变化非经典性。值得注意的是，我们发现这种粗粒度测量值优于传统的细粒度测量，用于非古老性检测：它检测到超出方差标准到达的非经典性，并且它具有比高级矩方法表现出更强的统计学意义。我们的工作通过为量子技术提供了可靠，有效的非经典性检测方式来显示粗粒度测量的有用性。
Coarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally detect the continuous-variable nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find that this coarse-grained measurement outperforms the conventional fine-grained measurement for nonclassicality detection: it detects nonclassicality beyond the reach of the variance criterion, and furthermore, it exhibits stronger statistical significance than the high-order moments method. Our work shows the usefulness of coarse-grained measurement by providing a reliable and efficient way of nonclassicality detection for quantum technologies.
