Title: Certifying the absence of quantum nonlocality Show Chinese title

Title: 证明量子非定域性的缺失

Abstract: Quantum nonlocality is an inherently non-classical feature of quantum mechanics and manifests itself through violation of Bell inequalities for nonlocal games. We show that in a fairly general setting, a simple extension of a nonlocal game can certify instead the absence of quantum nonlocality. Through contraposition, our result implies that a super-classical performance for such a game ensures that a player's output is unpredictable to the other player. Previously such output unpredictability was known with respect to a third party. Show Chinese abstract

Abstract: 量子非定域性是量子力学的一种本质上非经典的特性，并通过非局域博弈中贝尔不等式的违反而表现出来。 我们证明，在相当普遍的情况下，非局域博弈的一个简单扩展可以反而认证量子非定域性的缺失。 通过反证法，我们的结果表明，对于这样的博弈，超经典的表现确保了一个玩家的输出对另一个玩家来说是不可预测的。 以前，这种输出不可预测性仅相对于第三方已为人所知。