How Bell’s Theorem proved ‘spooky action at a distance’ is real

Re:How Bell’s Theorem proved ‘spooky action at a distance’ i... by simonh on Tuesday July 20, 2021 @01:11PM (#27896413)

It can't be used to send a message because all you can do is measure your particle. Even if doing so changes the state of the other particle far away (which isn't really what's happening, but that doesn't matter), all the other person at the end can do is measure their particle.

Neither of you can choose what the state of either particle is. You have no control, so there's no way to transmit information.

What you can do is agree in advance that you will both take certain actions based on the measured state of the particles. There's no way to be sure the person at the other end actually does so though.

[ Parent | on HN ]

Re:How Bell’s Theorem proved ‘spooky action at a distance’ i... by ende on Tuesday July 20, 2021 @01:24PM (#27896572)

I now have to imagine that Quantum Game Theory is a thing that exists.

[ Parent | on HN ]

Re:How Bell’s Theorem proved ‘spooky action at a distance’ i... by drdeca on Tuesday July 20, 2021 @11:20PM (#27901994)

AIUI, yes, it has been found that, e.g. there are games where two players who can’t communicate but who do have a pair of entangled qubits and can each make a measurement, would have a strategy which is better for both players than if they didn’t have this resource. (where the games in the version where they don’t have the resource of the entangled pair of qubits, are fairly simple games where each player receives some information and then has a choice between two options)

[ Parent | on HN ]