No man is an island.
Victor Toth in Quora about entanglement:
Well, actually, that is precisely the point. Most of the time, everything is entangled with everything else.
When we talk about, say, creating an entangled pair of particles, the point is not to get them entangled with each other; the point is to reduce or eliminate their entanglement with everything else to the extent possible, for as long as possible. That is to say, make sure that the pair are isolated from the environment.
That’s the hard part. Not entangling them with each other; that’s a given.
The original question:
If interacting particles become entangled, why isn't everything entangled with everything else from the big bang?
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