量子力学违反贝尔不等式吗？
Does quantum mechanics violate Bell's inequality?
摘要：
EPR佯谬被认为是一个解释性问题，也是量子力学的一个技术发现。它定义了两个量子纠缠的基本特征，因为需要研究两个非对易变量之间的关系。相比之下，在典型的贝尔实验中观察到四个变量。这不再是同一个问题。这个过程的全部复杂性只能通过对四个量子纠缠的分析来捕捉。事实上，在这种情况下出现了一个新的悖论，其后果是直截了当的。量子力学不能违反CHSH型不等式，在同样的意义上，局域实在论也不能做到这一点。解决方案是假设量子关联在发生违反时不适用于完全布居的水平，而只适用于输入光束的不相容切片。
英文摘要：
The EPR paradox is known as an interpretive problem, as well as a technical discovery in quantum mechanics. It defined the basic features of two-quantum entanglement, as needed to study the relationships between two non-commuting variables. In contrast, four variables are observed in a typical Bell experiment. This is no longer the same problem. The full complexity of this process can only be captured by the analysis of four-quantum entanglement. Indeed, a new paradox emerges in this context, with straightforward consequences. Quantum mechanics cannot violate CHSH-type inequalities, in the same sense in which local realism cannot do it. The solution is to assume that quantum correlations do not work at the level of full populations, when violations occur, but only apply to incompatible slices of input beams.
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