旋转不变性、相位关系与量子纠缠错觉
Rotational Invariance, Phase Relationships and the Quantum Entanglement Illusion
摘要：
另一个贝尔测试的“漏洞”-不完美的旋转不变性-进行了探讨，和新的现实主义的想法参数下转换用于最近的“量子纠缠“实验。通常的纠缠系统的量子理论假设我们具有旋转不变性（RI），因此符合率只取决于探测器设置之间的差异，而不是绝对值。贝尔检验本身并不一定需要RI，但如果RI失败，以符合曲线的形式呈现结果可能会严重误导。即使众所周知的检测漏洞被关闭，这种曲线的可见性也不会告诉我们纠缠的程度！这个问题可能与最近使用“退化II型参数下转换”源的实验特别相关。对许多实验结果的逻辑分析表明，现实主义的解释涉及一些新的物理学。这些系统可能比量子理论所暗示的更接近确定性。虽然这可能有利于那些试图在计算、加密、“隐形传态”等中利用所谓的“贝尔相关性”的人，它确实意味着这些系统服从普通逻辑，而不是量子逻辑。
英文摘要：
Another Bell test "loophole" - imperfect rotational invariance - is explored, and novel realist ideas on parametric down-conversion as used in recent "quantum entanglement" experiments are presented. The usual quantum theory of entangled systems assumes we have rotational invariance (RI), so that coincidence rates depend on the difference only between detector settings, not on the absolute values. Bell tests, as such, do not necessarily require RI, but where it fails the presentation of results in the form of coincidence curves can be grossly misleading. Even if the well-known detection loophole were closed, the visibility of such curves would tell us nothing about the degree of entanglement! The problem may be especially relevant to recent experiments using "degenerate type II parametric down-conversion" sources. Logical analysis of the results of many experiments suggests realist explanations involving some new physics. The systems may be more nearly deterministic than quantum theory implies. Whilst this may be to the advantage of those attempting to make use of the so-called "Bell correlations" in computing, encryption, "teleportation" etc., it does mean that the systems obey ordinary, not quantum, logic.
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