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cool article! I was most intrigued by this statement "...the collision isn’t mandatory. Turns out, entanglement can also occur if they are close enough when passing each other"

I read through the Science Advances article, but my science-fu is too weak, and i was unable to find where that was mentioned. Could you please point it out, and advise, if you know, what the distance was between the two particles when passing that was enough to successfully entangle them?

It seems to me that if this can be done, then purposeful entanglement may become much easier, cheaper, and thus more readily utilised.

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