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    Is it possible to determine if a photon is entangled?

    Hi! This may be a stupid question, but here goes. Is it possible to do a measurement to determine if a photon's waveform is entangled with another photon? You don't need to know who it's entangled with, and it's all right for the measurement to disrupt the entanglement. If this is...
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    Speed of disentanglement

    Speed of "disentanglement" Hi! If two particles are entangled, A and B, and someone messes with A, have scientists determined the speed at which the "signal" that A has been messed with gets from A to B (so B reacts accordingly)? I read that they currently think it's infinitely fast and is...