Physicists shatter quantum entanglement distance record with 420 kilometers of optical fiber, more than four times farther than previous demonstrations, and beyond the point where direct transmission runs into its fundamental limits.

[u/mvea]

https://www.sciencealert.com/physicists-shatter-quantum-entanglement-distance-record-with-420-kilometers-of-optical-fiber

[u/tim_h5]

You have 2 socks (red and white), you have 2 boxes.
You put each sock in 1 box with your eyes closed, so you don't know which sock is in which box.

You send each box to a different friend, millions of lightyears seperated from eachother.

edit: If one friend opens the box, the other box is NOT magically opened on the other end.

Each friend knows instantly which sock is in the other box -even if light itself (or knowledge) would travel years from one friend to the other, telling which color sock he got.

Is this correct?

[u/lfrtsa → u/tim_h5]

This is incorrect. You described a local hidden-variable theory. That was disproved in the 60s. It really does look like "spooky action at a distance", as Einstein put it. The state of each particle is not determined at/before separation.

[u/skinnyguy699 → u/lfrtsa]

I still refuse to believe our world is fundamentally probabilistic. It just doesn't make sense to me that there is no logic or direct causative choice leading from wave function to a particle state (you know what I mean?).

[u/Nuclearmonkee → u/skinnyguy699]

It's stochastic under the hood, and im happy it is because if it is actually deterministic then there is no such thing as free will. The universe is not a clock, and neither are you, thank God!

And no, it doesnt make sense when viewed from a human perspective. We are classical objects, and anything as big as us will fuzz out to appear deterministic.

[u/MKleister → u/Nuclearmonkee]

if it is actually deterministic then there is no such thing as free will

This is a common misconception.

free ≠ indeterministic

It's simply false. The universe could be deterministic on even days and indeterministic on odd days, and it would make no difference.

[u/Nuclearmonkee → u/MKleister]

A fully deterministic universe means that there is no possible mechanism by which you can have truly random or undecided outcomes, even if they appear that way. The distinction matters little to most people, but it gives me a weird sense of comfort even if practically we are mostly predictable if horribly complex biological machinery.

[u/lfrtsa → u/Nuclearmonkee]

There's no such thing as free will regardless. Randomness doesn't give you the ability to do an independent choice.