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DaddyIsAFireman t1_jefmlu1 wrote

Reply to comment by ASD_Detector_Array in Japan and China Connect Military Hotline to Reduce Tensions by bloomberg

Except no one has figured out how to communicate properly with entanglement.

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perpetual-let-go t1_jefn0hw wrote

It's easy. You just need a second line of communication to share which spin your source particle has and then they know which spin the entangled one has.

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DaddyIsAFireman t1_jefn8b3 wrote

I too used to think this. There are lots of videos online that can and do explain how and why that doesn't work much better than I can.

People much more intelligent than you or I have attempted to solve this problem and failed. I challenge you to find a peer reviewed video of article explaining how it does work if you don't believe me.

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perpetual-let-go t1_jefnmcp wrote

It was a joke - if you always communicate the particle state it defeats the purpose of having the particles.

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DaddyIsAFireman t1_jefnq9p wrote

Alright then. Thought you were the one who downvoted me so thought you were serious.

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Tripanes t1_jefx3sd wrote

You can't. If you could it would break the speed of causality and that would be a very big no no in terms of the laws of physics as we understand them.

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DaddyIsAFireman t1_jefy4t6 wrote

Actually that isn't the issue, entanglement can already do that.

https://physics.stackexchange.com/questions/541235/is-temporal-causality-broken-by-quantum-entanglement

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Tripanes t1_jeg2g66 wrote

Oh good, quantum stuff gets even more weird

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kindle139 t1_jeg4c9s wrote

(paraphrasing Sean Carroll from memory here)

As I understand it, even though the action is instantaneous over distance due to entanglement, because neither party can communicate this to the other, information isn’t traveling faster than the speed of light.

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DaddyIsAFireman t1_jegawdb wrote

Then how did he explain it as one of the particles can be many light years away and know the Planck time moment it's mated pair changes.?

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kindle139 t1_jegjh8r wrote

I don’t know, I think he might say something like if you look at the equations then you can see that distance is not a relevant factor.

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DaddyIsAFireman t1_jegagll wrote

That's why Einstein hated the idea so much, it broke one of his fundamental laws.

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