量子关联比经典关联大多少
How much larger quantum correlations are than classical ones
摘要：
考虑到两个双方相关之间的距离，一方必须切换以将一个相关转换为另一个相关的半局部结果的最小数量，我们表明，在爱因斯坦-波多尔斯基-罗森-贝尔方案中，物理上可获得的相关性集合的体积比在局部确定性或概率隐藏方案中可获得的相关性集合的体积大（3 π/8）^2 = 1.388，变量理论，但只有3 π ^2/32 = 0.925的体积允许任意因果（即，无信号）理论。
英文摘要：
Considering as distance between two two-party correlations the minimum number of half local results one party must toggle in order to turn one correlation into the other, we show that the volume of the set of physically obtainable correlations in the Einstein-Podolsky-Rosen-Bell scenario is (3 pi/8)^2 = 1.388 larger than the volume of the set of correlations obtainable in local deterministic or probabilistic hidden-variable theories, but is only 3 pi^2/32 = 0.925 of the volume allowed by arbitrary causal (i.e., no-signaling) theories.
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