两个观察者的“全有对全无”不可分割性

更强的双观察者全对无违反局部实在论

Stronger two-observer all-versus-nothing violation of local realism

我们引入了一个两个观察者的全对无的贝尔定理的证明，它减少了所需的量子预测的数量从9 [A。Cabello，Phys. Rev. Lett. 87，010403（2001）; Z.- B. Chen等人，物理修订版信函90，160408（2003）]到4，提供了大量的证据反对当地的现实主义，降低了检测效率的要求，一个决定性的实验测试贝尔定理，并导致贝尔不等式类似Mermin不等式三个观察者[N. D. Mermin，Phys. Rev. Lett. 65，1838（1990）]，但只需要两个观察员。

A Multiple Observer Probability Analysis for Bell Scenarios in Special Relativity

Here we present a Multiple Observer Probability Analysis (MOPA) for the purpose of clarifying topics in experimental Bell scenarios. Because Bell scenarios are interested in quantum effects between nonlocal measurement devices, we assign an observer to each device: Alice and Bob. Given that the observers are stationary and space-like separated, each observer is privy to different information along their shared equi-temporal lines due to permutations in the order they observe events. Therefore, each observer is inclined to assign different probability distributions to the same set of propositio…

Multi-setting Greenberger-Horne-Zeilinger Paradoxes

Greenberger-Horne-Zeilinger (GHZ) paradox provides an all-versus-nothing test for the quantum nonlocality. In all the GHZ paradoxes known so far each observer is allowed to measure only two alternative observables. Here we shall present a general construction for GHZ paradoxes in which each observer measuring more than two observables given that the system is prepared in the $n$-qudit GHZ state. By doing so we are able to construct a multi-setting GHZ paradox for the $n$-qubit GHZ state, with $n$ being arbitrary, that is genuine $n$-partite, i.e., no GHZ paradox exists when restrict to a subse…

两粒子纠缠作为三粒子纠缠态的一种性质

Two-particle entanglement as a property of three-particle entangled states

在最近的一篇文章[Phys. Rev. A 54，1793（1996）]中，Krenn和Zeilinger研究了通过选择两个观察者1和2的自旋测量结果与第三个观察者的相应测量结果得到的数据子系综的条件两粒子关联。在本文中，我们明确地写出了所需的条件，以便观察员1和2的选择结果违反贝尔不等式的一般测量方向。它表明，有无限多套方向给出最大程度的违反。进一步，我们将作者的分析推广到三正交态类|Psi> = c_1| z_1>| z_2>| z_3> + c_2|-z_1>|-z_2>|-z_3>。结果发现，一个最大的违反贝尔不等式发生提供相应的三粒子状态产生一个直接的（“全部或没有”）非定域性矛盾。