论文标题
量子相关函数的模拟不足以描述量子纠缠
Simulation of Quantum Correlation Functions is not Sufficient Resource to Describe Quantum Entanglement
论文作者
论文摘要
钟声定理表明，量子力学不是一种地方现实主义的理论，通常被解释为自然的非局部性。这一结果导致了这种信念，即非局部性和纠缠是相同的资源。但是，这种信念在文献中受到了挑战。在这里，我们根据Brassard-cleve-Tapp（BCT）模型重新检查非局部性与纠缠之间的关系，该模型最初是为了通过使用经典通信增强的共享随机变量来模拟贝尔状态的量子相关性。我们通过提出基于完美相关性（反相关）关系的可观察到的事件，来得出一个新的标准，用于将量子力学与BCT模型区分开。特别是，我们表明，在BCT模型中，可以为两个相反的输入设置获得相等的输出，而非零概率为0.284。因此，从这个意义上说，我们认为BCT模型可以产生非物理结果。我们还通过BCT模型的非本地版本显示出同样的问题。
The Bell theorem expresses that quantum mechanics is not a local-realistic theory, which is often interpreted as nonlocality of the nature. This result has led to this belief that nonlocality and entanglement are the same resources. However, this belief has been critically challenged in the literature. Here, we reexamine the relation between nonlocality and entanglement in light of the Brassard-Cleve-Tapp (BCT) model, which was originally proposed for simulating quantum correlation of Bell's states by using shared random variables augmented by classical communications. We derive a new criterion for distinguishing quantum mechanics from the BCT model through suggesting an observable event based on the perfect correlations (anti-correlations) relation. In particular, we show that in the BCT model one can obtain equal outputs for two opposite input settings with the nonzero probability 0.284. Hence, in this sense we argue that the BCT model can give rise to an unphysical result. We also show the same problem with a nonlocal version of the BCT model.
