标题： 上下文性可以通过非上下文实验进行验证 显示英文标题

标题： Contextuality Can be Verified with Noncontextual Experiments

摘要： 通过将广义非定域性与Kirkwood-Dirac（KD）准概率分布联系起来，我们揭示了广义非定域性的新特性。量子态可以由KD分布表示，这些分布的取值位于复数单位圆盘内。只有对于“KD正”的态，KD分布才是联合概率分布。可以通过一系列弱测量和投影测量来测量KD分布。我们设计了这样的实验，并表明当底层态不是KD正时，该实验具有非定域性。我们分析了这一联系，针对那些不能分解为纯KD正态的凸组合的混合KD正态。我们的结果是构建了一个非定域的实验，使实验者能够验证非定域性。 显示英文摘要

摘要： We uncover new features of generalized contextuality by connecting it to the Kirkwood-Dirac (KD) quasiprobability distribution. Quantum states can be represented by KD distributions, which take values in the complex unit disc. Only for ``KD-positive'' states are the KD distributions joint probability distributions. A KD distribution can be measured by a series of weak and projective measurements. We design such an experiment and show that it is contextual iff the underlying state is not KD-positive. We analyze this connection with respect to mixed KD-positive states that cannot be decomposed as convex combinations of pure KD-positive states. Our result is the construction of a noncontextual experiment that enables an experimenter to verify contextuality.