评论：测试“幽灵超距作用”的速度
Comment on: Testing the speed of 'spooky action at a distance'
摘要：
在最近的一个实验中，Salart等人解决了贝尔型实验中假设通信速度和参考系的重要问题。作者报告说，他们“使用纠缠光子进行了贝尔实验”，并从他们的实验结果得出结论，“为了维持基于幽灵超距作用的解释，我们必须假设幽灵作用的传播速度甚至大于我们实验中获得的界限”，超过光速几个数量级。在这里，我们表明，分析实验过程，解释与亚光速甚至没有通信在所有存在的实验。
英文摘要：
In a recent experiment, Salart et al. addressed the important issues of the speed of hypothetical communication and of reference frames in Bell-type experiments. The authors report that they "performed a Bell experiment using entangled photons" and conclude from their experimental results that "to maintain an explanation based on spooky action at a distance we would have to assume that the spooky action propagates at speeds even greater than the bounds obtained in our experiment", exceeding the speed of light by orders of magnitude. Here we show that, analyzing the experimental procedure, explanations with subluminal or even no communication at all exist for the experiment.
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