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<blockquote data-quote="Umbran" data-source="post: 6688268" data-attributes="member: 177">And here, we see perhaps some fundamental difference in communication philosophies.&nbsp; All of what you say is entirely true, but not necessary for the point - that the example given did not lead to being able to separate matter and anti-matter in the overall universe!The point is that one of the possible handles we have to separate the pair requires information to use.&nbsp; Putting this back in context of the patent - the target is a slab of metal, so we don't know, and cannot measure, the spin state change or recoil of the individual atoms in the interaction.&nbsp;&nbsp; The electron and positron spins are correlated, such that their creation adds no new net angular momentum to the system, but we still don't know what way they'll be pointing.&nbsp; So, separating on the basis of that is not simple.I was also trying to stay away from the details of quantum mechanical spin, helicity, and magnetic moment, as those can be *really* confusing to laymen.</blockquote>

[QUOTE="Umbran, post: 6688268, member: 177"] And here, we see perhaps some fundamental difference in communication philosophies. All of what you say is entirely true, but not necessary for the point - that the example given did not lead to being able to separate matter and anti-matter in the overall universe! The point is that one of the possible handles we have to separate the pair requires information to use. Putting this back in context of the patent - the target is a slab of metal, so we don't know, and cannot measure, the spin state change or recoil of the individual atoms in the interaction. The electron and positron spins are correlated, such that their creation adds no new net angular momentum to the system, but we still don't know what way they'll be pointing. So, separating on the basis of that is not simple. I was also trying to stay away from the details of quantum mechanical spin, helicity, and magnetic moment, as those can be *really* confusing to laymen. [/QUOTE]

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