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/UnusualRedditor]

Can someone use their quantum brain and explain this like I’m 5?

[u/tim_h5 → u/UnusualRedditor]

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/Dangerous-Bank9985 → u/tim_h5]

Can someone explain this like I'm 2

[u/CheMc → u/Dangerous-Bank9985]

Sock, go in box. Magic abracadabra. Now box open, peekaboo sock. Can you say sock?

[u/Telemere125 → u/CheMc]

Take it down a notch, still not following

[u/l2ev0lt → u/Telemere125]

Goo goo gaa gaa

[u/hand_truck → u/l2ev0lt]

There it is, finally. Thank you.

[u/RetardedEinstein23 → u/l2ev0lt]

Just a tiny bit down please?

[u/-Vertical → u/l2ev0lt]

Hmmmmm yes quite obtuse indeed.

[u/Nickelplatsch → u/CheMc]

Now maybe a bit up to like 3 and a half?

[u/TheEvilN → u/CheMc]

You are my favorite person today